Maybe Zev Senesca? I have no clue. I say Zev Senesca because of the grey helmet: But, officially, Lego's Zev Senesca is this one:
unknown, probably generic rebel pilot minifig I looked up Rogue Squardon helmets on Google Image, the closest to that are Porkins in A New Hope but his has yellow rebel Symbol and Luke is very close as well but his helmet does not have the sun like thing in the middle ridge but three red stripes on the ridge. It is not Wedge, Dak, or Wes Janson either and those are the only pilots we really get to see during the snowspeeder battle and they have vastly different designs on there helmets.. Could be Dash Rendar from the Video Game Shadows of the Empire as he also fought at Hoth.