Geraldine Ruddy was a female Human who lived in the 24th century. In the 2370s, Ruddy was a member of Starfleet and served aboard the USS Centaur as the science officer for the starship.

In 2374, Ruddy was aboard the Centaur when it was attacked by the Jem'Hadar. (DS9 - The Dominion War novel: Call to Arms...)

Several weeks later, Ruddy participated in a mission where the Centaur engaged Jem'Hadar forces in the Argolis Cluster. Ruddy would later be aboard the Centaur during the battle to retake Deep Space 9 from the Dominion. (DS9 - The Dominion War novel: ...Sacrifice of Angels)

USS Centaur personnel
	Aryl • Bilecki • Roger Buick • Mohammed Fitzgerald • Randall Lang • Narhi • Charlie Reynolds • Geraldine Ruddy