Fremd

a fremd day

Something fremd has been going on here.

A fremd man this.

Pits it i' da fremd-man's hert.

[...] seeing that they were fremd in heart, if they were kin in blood.

The doctor went up to the bed, and said, firmly, " Miss Garnock, you must not keep Mr. Yonge any longer." "Who'll he be that comes meddling between me and my Tar?" shrieked the patient. "Mither, bid yon fremd body gang his ways. I'll no be fashed wi' him the day."

[...] and if I'm to be no more hereafter to them that belong to me, than to legions of strange angels, or a whole nation of fremd folk!

There's room for everybody in the world, I suppose, and something for everybody to do, and it behoves them that have few kin to make the more friends of fremd folk.

Thus, a person living with a family to whom he is not related is termed "a fremd body." If it were asked, "Is he akin to you?" the answer would be, "Nawe, he's fremd," i.e. "he's one of us, but not a relation."