(Hon. தமையனார்.) Elder brother, or elder male cousin, son of a paternal uncle or of a maternal aunt–In direct address, அண்ணா, the vocative of அண்ணன், is used. (c.)
Fabricius (1972)
தமையன் — noun
, தமயன், s. (hon. தமையனார்) an elder brother, அண்ணன்
male cousin, son of a paternal uncle or a maternal aunt