Here are some more fun ones:

en.wikipedia.org/wiki/Coccyx

The term coccyx is derived from the ancient Greek word κόκκυξ[18][19] kokkyx “cuckoo”;[20] the latter is attested in the writings of the Greek physician Herophilus to denote the end of the vertebral column.[21] This Greek name for the cuckoo was applied as the last three or four bones of the coccyx resemble the beak of this bird,[18][21][22][23] when viewed from the side

en.wikipedia.org/wiki/Hippocampus

The earliest description of the ridge running along the floor of the inferior horn of the lateral ventricle comes from the Venetian anatomist Julius Caesar Aranzi (1587), who likened it first to a silkworm and then to a seahorse (Latin hippocampus, from Greek ἱππόκαμπος (latinised: ìppókampos) from ἵππος (ippos), ‘horse’ + κάμπος (kámpos), ‘sea monster’)

Not as fun, but still interesting:

en.wikipedia.org/wiki/Deltoid_muscle

It is called so because it is in the shape of the Greek capital letter delta (Δ)

en.wikipedia.org/wiki/Serratus_anterior_muscle

The muscle is named from Latin: serrare = to saw (referring to the shape); and anterior = on the front side of the body.