←
Middle Dutch sô (inherited)
←
Proto-Germanic *swa (derived)
←
Proto-Germanic *swē (mention)
←
Proto-West Germanic *swā (inherited)
←
Old Dutch sō (inherited)
→
Afrikaans so (inherited)
→
Old English swa (cognate)
→
Westrobothnian sä (mention)
→
Icelandic svo (mention)
→
Luxembourgish esou (cognate)