"Nickname comes from an Old English expression, an eke name. Eke meant 'also'. It was your 'other' name. Over time, the n of an got transferred to the beginning of eke. An eke became a neke. The pronunciation changed, and the spelling, and eventually we get the modern word." -By Hook or By Crook by David Crystal, p 92
So is eke meaning "also" cognate with the German auch? Sehr interessant, as they used to say on Laugh-In.
"Nickname comes from an Old English expression, an eke name. Eke meant 'also'. It was your 'other' name. Over time, the n of an got transferred to the beginning of eke. An eke became a neke. The pronunciation changed, and the spelling, and eventually we get the modern word."
-By Hook or By Crook by David Crystal, p 92