Perh. f. CUMMER, F. commère fellow godmother + -RED, as in kinred, kindred. (It is too early for comrade.)
c. 1488. Plumpton Corr., 63 [An abbot writes to the father of his god-child] You, with my lades, your mother and your wife, my comered
[Signed] Your poore gossip and true lover, etc.