Yes. The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
What does Asa mean? Asa [asa] as a boys' name (also used less generally as girls' name Asa) is pronounced AY-sah. It is of Hebrew origin, and the meaning of Asa is doctor, healer. Biblical: name of the third king of Judah, who reigned for forty years. Made popular by the Puritans in the 17th century.
Cutting through the swathes of arguments as to whether the origin was from Alyes (French) Alice (English) Alan (Scottish) or Ellis (Norman from Hebrew), what can be said with historical accuracy is that the oldest know recording is English! (see below).