Irish coiteann

← Proto-Celtic *[[kom-]][[tegos|teges-]]nos (inherited)

← Scottish Gaelic coitcheann (cognate)

← Manx cadjin (cognate)

← Middle Irish coitchenn (inherited)

← Old Irish coitchen (inherited)

→ Irish comhchoiteann (affix)

→ Irish uilechoiteann (affix)

→ Irish coitianta (affix)

→ Scottish Gaelic coitcheann (cognate)

→ Manx cadjin (cognate)