- tòiseach
- a beginning, a chief, Irish toiseach, a captain, Old Irish tóisech, praestans, leader, Welsh tywysog, dux, princeps, Welsh Ogmic tofisac and tovisaci (Latin): *to-vessiko-s, root ved, lead, bring; Lithuanian wedù, lead, Church Slavonic veda$$?, duco; Zend vádhayeiti, bring, lead. Old Irish has also do-fedim, I lead.
Etymological dictionary of the Gaelic language. Alexander Gairm Publications. 1982.