The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
Meaning & History. From a Germanic name meaning eagle power, derived from the elements arn eagle and wald power. The Normans brought it to England, where it replaced the Old English cognate Earnweald.It died out as an English name after the Middle Ages, but it was revived in the 19th century.aints bearing the name include an 8th-century musician in the court of Charlemagne and an 11th-century French bishop who is the patron saint of brewers. It was also borne by Arnold of Brescia, a 12th-century Augustinian monk who rebelled against the church and was eventually hanged.
Originally a short form of Germanic names that began with the element ermen meaning whole or universal. It was introduced to England by Emma of Normandy, who was the wife both of king Ethelred II (and by him the mother of Edward the Confessor) and later of king Canute.riginally a short form of Germanic names that began with the element ermen meaning whole or universal. It was introduced to England by Emma of Normandy, who was the wife both of king Ethelred II (and by him the mother of Edward the Confessor) and later of king Canute.