Compound.
O.G. Wigger, Wiher—Eng. Gwyer, Quier, Quire.
The stem will, on which are formed guill and cwill, may be referred to Goth. wilya, will, perhaps, in the sense of resolution.
Guil, cwil, for will.
Frnk. Guila—Eng. Guille, Guily, Quill—Fr. Guille, Quille.
Diminutive
O.G. Willic—Eng. Quilke—Fr. Quillac.
Compounds.
(Helm, helmet), Frnk. Guilhelm—Eng. Gwillam—Fr. Guillaume. (Man, vir), O.G. Wilman—Eng. Quillman—Fr. Guillemain. (Nand, daring), O.G. Willinand—Eng. Quillinan.
I am inclined, from the way in which the names run into each other, to take cwen and cwin to be one and the same stem, and to refer them to A.S. wine, friend.