The word is possibly a Latinism, only attested in Anglo-Norman in these treatises on formal letter-writing associated with Thomas Sampson, but otherwise not present in Medieval French.
(
s.xiv2; MS: c.1400
) si un homme mandra a sa soere [...]; il ferra fyn mencione de la salutacione et de la fraternitee ou sorrelitee, s’il ferra salutacione
40.269