Slaaf m (plural Slaven, diminutive Slaafje n)
This word may be considered offensive because it is identical with the word slaaf (“slave”).
slaaf (plural slawe)
From Late Latin sclavus
slaaf m (plural slaven, diminutive slaafje n, feminine slavin)
Ultimately from Proto-Slavic *slověninъ (plural form is *slověne).