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.
This interesting surname is of Anglo-Saxon origin, and is lcoational from a place so called in Kent, which was originally the name of a river. The first element seems to be derived from the Old English pre 7th Century rum, spacious, but its formation and meaning are obscure.he first recorded spelling of the family name is shown to be that of Robert de Romenel, which was dated 1086, The Domesday Book of Kent, during the reign of King William 1, The Conqueror, 1066 - 1087.