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.
African-Somali origin: It is derived literally from the word ayana which is of the meaning 'beautiful flower'. The name could also have developed as a form of Anna. In the USA, it is particularly used by Afro-Americans. In addition, Ayana is a derivative of the English Aiyana.