Thanks for sorting out these, Alan!
Grace

Tekur hann þá að fylkja liði
He begins (see taka + inf, Z7)

fékk ekki fylgt honum.
was not able to (see fá + pp, Z7) accompany (keep up with) him.

vegið víg
has slain-a-man (see vega víg, Z7)

Fred and Grace Hatton
Hawley Pa