Turns out it has! Not very often, though. The name Ibis has appeared in the SSA data on and off since the 1960s, typically registering as a girl name. I don’t think many of these babies were named with the bird in mind, though; “Ibis” seems to be a variant spelling of “Ivis” in Spanish-speaking families.
So, which of those four (very similar) names names do you like best?