Old Irish ocht

← Proto-Celtic *oxtū (inherited)

← Proto-Indo-European *oḱtṓw (inherited)

→ Old English eahta (cognate)

→ Irish ocht (inherited)

→ Irish ochtó (mention)

→ Scottish Gaelic ochd (inherited)

→ Manx hoght (inherited)

→ Old Irish ochtmad (affix)