Tácor

According to the Old English Dictionary:

(-ur), es;

tácor

m. A husband's brother, brother-in-law :-- Tácor (-ur) levir, Txts. 74, 598. Tácor, Ælfc. Gr. 8; Zup. 27, 20: levir, i. frater mariti, Wrt. Voc. i. 52, 31. Tácor, ðæt is brýdguma[n] bróðor levirum, ii. 84, 16. Tácor, 50, 30: Hpt. Gl. 498, 75. [O. H. Ger. zeihhor (-ir, -ur) levir, frater mariti.] tacor