outland + -er, in part after Du uitlander, foreigner
outlander in American English
(ˈautˌlændər)
noun
1.
a foreigner; alien
2.
an outsider; stranger
Word origin
[1590–1600; outland + -er1]This word is first recorded in the period 1590–1600. Other words that entered Englishat around the same time include: Byzantine, attack, jolt, mission, radius-er is a suffix used in forming nouns designating persons from the object of their occupationor labor (hatter; tiler; tinner; moonshiner), or from their place of origin or abode (Icelander; southerner; villager), or designating either persons or things from some special characteristic or circumstance(six-footer; three-master; teetotaler; fiver; tenner)