Whilst doing some research into my family tree, in some parish church baptism records I came across a Mr & Mrs Fish who named their son George Dolphin Fish. I guess zoology wasn't their strong point.
Amongst his siblings were two brothers: John Pilot Fish* and Salmon Fish. His sisters were more sensibly named:
Sarah Fish, Rachel Elizabeth Fish and Ellen Sophia Fish
He was born in 1840. In 1863 he married Harriette Bird!
NB: They aren't relations of my mine.
* I wonder whether they were thinking of the pilot whale, which is, in fact, a species of dolphin.