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.
It was derived from the name Aassi, which is a Old Norse form of the Old English personal name Oswald, which means divine power. The original spelling of the surname Assi was Aassiesen, and this form is preserved in the Shetlands; many diminutive forms of the surname also exist. The surname was recorded in the Landnamabok (the Icelandic Book of settlement), as Asi.