Emma f
English: of Germanic origin, introduced to Britain by the Normans. It was the name of the mother of Edward the Confessor. It originated as a short form of the medieval versions of compound names such as ERMINTRUDE (SEE Ermintrude) and IRMGARD (SEE Irmgard), containing the element erm(en), irm(en) entire (cf. IRMA (SEE Irma)). It is now sometimes used as a pet form of EMILY (SEE Emily), but this is etymologically unjustified.
First names dictionary. 2012.