"Dromaiidae" is, in a sense, an English word already. It is the scientific term for the zoological family that includes the emus. By etymology, it means "family of runners", from the ancient Greek word dramein, "to run", and the suffix -ides"descendant".

Emus belong to the group of flightless birds known as ratites. They are of the order Casuariiformes, and therefore of the family Casuariidae.

Rheas, Emus, and Ostriches are all a part of the Ratite family; a family of large flightless birds

No they are not. They are from the same family as Ostriches, Emus and Cassowaries.

Ikemefuna spends 3 years away from his biological family and with Okonkwo's family.