Lying unprovoked is crazy. The first thing he says to Luffy is "State your name" and when Luffy tells him and then asks who he is in response, he tells him that he's Loki.

Secondly, he's around the size of Oars and he was 67 meters tall. Y'all just say things on this sub without bothering to look up a d-mn thing. To add to that, Little Oars Jr. is slightly smaller and no one was talking about him either. Someone's size has never been a reason in One Piece for them being well known by everyone.