I.
TANTALUS
|
Pelops
__________|__________________
| |
Atreus Thyestes
_________|__________ |
| | |
Agamemnon Menelaus Aegisthus
(=Clytemnestra) (=Helen) (=Clytemnestra)
_____|________________________
| | |
Iphigenia Electra Orestes
(Also, a sister of Agamemnon, name variously given, married Strophios, and was the mother of Pylades.)