Emma f. Originally a hypocoristic of various names beginning with Old High German ermen, Old Saxon irmin 'strong', the name quickly gained existence as an independent name.
The name of an 11th C queen consort of England, Denmark, and Norway, and an 11th C Austrian saint.
The English diminutive Emmot and the vernacular form Em are witnessed in 1379 in the relational bynames Emmot'sone (WRYPT1 p. 40) and Emsoñ WRYPT1 p. 163).