Alaikumassalam wa rahmatullah, We have no specific information on this name. It sounds like it could be a variant of the name Amalia, which is a Germanic name that comes from amal (“work”) and thus has meanings “industrious”, “fertile”. In Hebrew, Amalia means “labor of God” according to Wikipedia. Amalia (the Germanic and Hebrew name) is an acceptable name for Muslims, but we cannot say anything specific about Ammaila.