The USS Igraine (NCC-74980) was a Federation starship that was in service to Starfleet in the early 25th century.
In 2401, the Igraine participated in Frontier Day celebrations near Sol Station. Along with the rest of the fleet, it was seized by the Borg Collective after its younger crew were assimilated by a Borg signal transmitted via Jack Crusher. (PIC: "Vox")
This starship was only mentioned in writing.
This ship was presumably named for Queen Igraine, who was the mother of King Arthur.
This ship was identified by Dave Blass as a Sovereign-class. [1]