Tigernach, an early Irish personal name, may refer to:
Tigernach of Clones (d. 549), patron saint of Clones Tigernach mac Fócartai (d. 865), king of Lagore (south Brega) Tigernach Ua Braín (d. 1088), abbot of Clonmacnoise and Roscommon, putative author of the Annals of Tigernach Tigernach Ua Máel Eóin (d. 1172), abbot of Clonmacnoise
See also Annals of Tigernach