Old Norse burðr

← Proto-Germanic *burþiz (inherited)

← Proto-Germanic *beraną (mention)

← Proto-Indo-European *bʰer- (root)

→ English birth (derived)

→ Danish bør (inherited)

→ Danish byrd (derived)

→ Westrobothnian åból (inherited)

→ Old Swedish byrþ (inherited)

→ Old Norse afburðar (prefix)

→ Old Norse afburðr (prefix)

→ Old Norse atburðr (affix)