maybe it's crem- - in OED ramson points to rams...

Forms: 1 hramsa, -se, (hromsa, ramese), 5 rammys, pl. ramsis, -zys, 6 ram(m)es, 8–9 rams, 9 Sc. ramsh. [OE. hramsa, -se = MLG. ramese, G. rams (with many dial. variants: see Grimm), Da., Sw., and Norw. dial. rams (Sw. rams-lök), cognate with OIr. crem (Ir. and Gael. creamh, W. craf), Lith. kermùsz., Russ. cheremsha wild garlic, Gr. **** onion.]