This formation from the gluttire etymon was probably influenced by strangler (cf. FEW 12,287a and DEAF G899).
v.a.
1to swallow (up) whole, devour:
(
1121-35; MS: s.xii3/3
) Li cocodrille [...] itant par est glut Que tut vif le transglut (var.
(L: s.xii3/3) stranglut
). Ydrus el cors li entre
656 (var.)
strangluter (1121-35)