Melinda Snodgrass was a Human in the 22nd century.
In 2102, she was the commander of the SS Hokule'a. (TNG: "Up The Long Ladder", okudagram)
This character was only mentioned in writing.
The name of this captain was mentioned in a list of ships that were launched from Earth, with destinations in or near to the Ficus sector, between the years 2123 and 2190. This list was displayed on Jean-Luc Picard's desk monitor in his ready room aboard the USS Enterprise-D. A legible version of the okudagram first appeared in the reference book, Star Trek: The Next Generation - The Continuing Mission. The list became legible to viewers with the remastered episode.
Snodgrass was a reference to Melinda M. Snodgrass, the writer of this episode.