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.
From a surname which was originally derived from a place name which meant ash tree town in Old English. ASIA (1) f English (Modern), Italian (Modern). From the name of the continent, which is perhaps derived from Akkadian asu, meaning east.