No, he's not, but with console commands you can make him marriageable. The only other male Argonians that are marriageable by default are Scouts-Many-Marshes (Windhelm Docks) and Deerkethus (Darkwater Crossing)
And their both a bit... odd, if you marry Scouts-Many-Marshes make sure to catch him after the ceremony before he leaves the temple and tell him where you want to live otherwise he could vanish. The same with Derkeethus but he often gets lost on way there and starts wandering, he can also have a habit of returning to Darkwater Pass constantly.