Welsh brawd

← Proto-Celtic *brātīr (inherited)

← Proto-Celtic *brātus (inherited)

← Proto-Indo-European *bʰréh₂tēr (inherited)

← Proto-Indo-European *gʷérHtus (inherited)

← Old Welsh braut (inherited)

← Old Welsh braut (inherited)

→ English brother (cognate)

→ English chum (mention)

→ Welsh brodyr (affix)

→ Irish go brách (cognate)

→ Crimean Gothic bruder (cognate)