There was Delphinus Polyglott.
"The Works of Edgar Allan Poe Volume 4 (of 5) of the Raven Edition" by Edgar Allan Poe
Postquam puer morbo abiit, et ipse delphinus periit.
"The Anatomy of Melancholy" by Democritus Junior
To the right of Equuleus, towards the west-south-west is the constellation Delphinus.
"Half-hours with the Telescope" by Richard A. Proctor
The little asterisms Sagitta, the Arrow, and Vulpecula and Anser, the Fox and Goose, are shown just above Delphinus.
"A Field Book of the Stars" by William Tyler Olcott
Dauphin, after whom their son was named Dauphin (Delphinus).
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9" by Various