Marked are the 12 gods of Olympus and the gods who reigned the world a time (Uranos, Cronus and Zeus).

                                   Chaos
                                     |
                             +-------+--------------+------+
                             |                      |      |
                           Gaia                  Tartarus  Eros
                            |                       |
              +--------+----+-----+------------+    |
              |        |    |     |            |    |
           Python      |    |  +--+----+       +--+-+
                       |    |  |       |          |
                       |    | Uranus  Pontus    +-+------+
                       |    |   | |     |       |        |
                       |    +-+-+ |   +-+--+   Echidna  Typhon
                       |      |   |   |    |
                       |      |   +-+-+    |
                       |      |    /       |
                       |      |   /        |
     ,------------------------|--'         |
    /                  |      |            |
   /                   +------|------+-----+
  |                           |       \
  |                           |        '--------------------------------------------------------------------------------------------.
  |                           |                                                                                                      \
  |                +----------+------------------------------------------------------------------------------------------+------------|------------+--------------------+------------------------------------------------------+---------------------+
  |                |                                                                                                     |            |            |                    |                                                      |                     |
  |                | (Titan)                                                                                             | (Cyclopes) |            | (Hecantochires)    |(Gigantes)                                            | (Erinyes)           | (Meliae)
  |                |                                                                                                     |            |            |                    |                                                      |                     |
  |       +------+-+-----+--------+--------+--------+--------+-------+------+---------+--------+-------+        +--------+--------+   |    +-------+------+             +----------+-----------+--------+-------+       +------+-+----------+       ...
  |       |      |       |        |        |        |        |       |      |         |        |       |        |        |        |   |    |       |      |             |          |           |        |       |       |        |          |
  |   Oceanus  Crius   Coeus   Iapetus   Phoebe   Tethys  Cronus   Rhea  Themis   Mnemosyne Hyperion Theia   Brontes  Steropes  Arges | Briareus Gyges  Cottu       Alcyoneus   Clytias   Enceladus  Echion   Athos  Alecto  Tisiphone   Megaera
  |      |               |         |       |         |       |       |      |         |        |       |                              |                                                                          
  |      |               +-------+-|-------+         |       +-+-----+      |         |        |       |                           +--+----+--------+------+-------+
  |      |                       | |                 |       | |             \         \       |       |                           |       |        |      |       |
  |      +----+------------------|-|-----------------+       | |              \         \      |       |                        Nereus  Thaumas  Phorcys  Ceto  Eurybia
Aphrodite     |(Oceanid)         | |                         | |               \         \     +------++                           |                |      |
  | |   +-----++----+------------|-|--------+                | |                \         \            \                           |                +--+---+
  | |   |      |    |            | |        |                | |                 \         \            \                          |                   |
  | | Asopus ... Clymene         | |      Doris              | |                  \         \            +----+------+-----+       |                   | (Phorcydes)
  | +----|----------|------------|-|----------------+--------+ |                   \         \                |      |     |       |                   | 
  |      |          +---------+--|-+        |        \         |                    \         \             Selene  Eos  Helios    |                 +-+--------+-----------------+----------+---------------------+-----------------+---------------+
  |      |                    |  |          +---------\--------|---------------------\---------\--------------|------|------------++                 |          |                 |          |                     |                 |               |
  |      |        +--------+--+--|----+------------+   \       |                      \         \             |      |             \                Echidna     | (Gorgon)      Ladon        | (Graeae)            |(Hesperides)   Scylla            | (Siren)
  |      |        |        |     |    |            |   Pothos  |                       \         \   Metis    |      |              \ (50 Nereid)               |                            |                     |                                 |
  |      |     Atlas   Epimetheus| Prometheus  Menoetius       |                        \         \    |      |      |               +-----------+-----+        +-------+-------+         +--+--+-------+         ++------+--------+---------+      ...
  |      |       |               |                             |                         \         \   |      |      |               |           |     |        |       |       |         |     |       |         |       |        |         |
  |      |       |        +------+--+         +-------+------+-+----+-------+-------+     \         \  |      |      |            Amphitrite  Thetis  ...     Medusa  Sthenno  Euryale  Deino  Enyo  Pemphredo  Aegle  Arethusa  Erytheia  Hesperia
  |      |       |        |         |         |       |      |      |       |       |      \         \ |      |      |
  |      |     Maia     Asteria   Leto     Hestia   Hera  Demeter  Hades  Poseidon Zeus     \         \|      |      |
  |      |      |                  |                 |       |                       |       \         |      |      |
  |      |      |                  |                 |       |                  ++++++++++++  |        |\     |      |
  |      |      |                  |                 |       +---------+--------+| ||| |||||  |        | \    |      |
  |      |      |                  |                 |                 |         | ||| ||||+--|---+----+  |   |      |
  |      |      |                  |                 |            Persephone     | ||| |||+-+-+   |       |   |      |
  |      |      +-----+------------|-----------------|---------------------------+ ||| ||+--|-----|--+----+   |      |        (Muse)
  |      |            |            +-------+---------|-----------------------------+|| ||   |     |  +--------|------------+-------+------+-----+--------+----------+----------+-------+--------+------+---------+---------+
  |      |          Hermes                 |         |                              || |++--|-----|-----------+      |     |       |      |     |        |          |          |       |        |      |         |         |
  |      |            |               +----+--+      |                              || | |  \-----|---------\        |   Melete  Mneme  Aoede  Clio  Melpomene  Terpsichore  Thalia  Euterpe  Erato  Urania  Polyhymnia  Calliope
  |    Aegina         |               |       |      +-------------+----------------+| +-|--------|---+------\-------+
  |      |            |            Artemis  Apollo                 |                 |   |        |   |      ------------+---------------------+-----------------+
  |      +----+-------|--------------------------------------------|-----------------+   |     Athena |                  |                     |                 | 
  |           |       |                          +--------+--------+--+--------+         |          Ersa                 |                   Astraea          Moirae (Clotho, Lachesis, and Atropos)
  |         Aeacus    |                          |        |           |        |     +-+-+---+                           |                     
  |                   |                         Ares  Eileithyia  Hephaistos  Hebe   | |     |                           |  (Auxo, Carpo, and Thallo) 
  |                   |                          |                                  ..... Pandia                       Horae        (And)
  +-------------------|---------------+----------+                                                                          (Dike, Eunomia, and Eirene)
  |                   |               |
  +---------------+---+    +------+---+----+--------+
                  |        |      |        |        |
                  |     Anteros  Eros   Harmonia  Himeros  
                  |
     +----------+-+----------+-------+------+
     |          |            |       |      |
  Eunomia  Hermaphroditus  Peitho  Rhodos  Tyche