Billy (he was never named on the show but the First Contact end credits refer to him as Billy Wraith) – The Queen (5×08 (probably)), First Contact (5×10) –
James Chutter

Note – Whoever wrote this Stargate wiki entry for Billy regards James Chutter’s Bridge Officer Wraith and Billy as being the same character. The facial hair and forehead tattoo is the same for both so it’s logical that they are supposed to be the same Wraith.

Appearance in the Stargate Atlantis: Legacy novel series as Precision.