More about avuncular
Avuncular typically means “acting in a kindly, benevolent manner towards one’s nieces and nephews.” Avuncular comes from the Latin noun avunculus “mother’s brother, uncle,” a derivative of the noun avus “grandfather, forefather, ancestor.” (English uncle comes via Old French and Anglo-French oncle, uncle from avunculus.) Latin avus comes from Proto-Indo-European awos “grandfather, maternal grandfather.” Awo– is also the source for Armenian hav “grandfather,” Old Irish áue, Middle Irish ó(a), úa, both meaning “grandson, descendant,” and the source of O’ in Gaelic surnames, such as O’Connor “descendant of Connor.” Variants of the stem appear in Lithuanian avýnas “maternal uncle,” Old Prussian awis, and Old Church Slavonic ujĭ, both meaning “uncle.” The Latin term for father’s brother, paternal uncle is patruus (a derivative of patr– father), for maternal aunt matertera (a derivative of mātr-), and for paternal aunt amita. Latin is interesting to anthropologists because of its unusually full and exact kinship terms, every possible kinship relation having its own term and not a descriptive compound noun, for example, “father’s brother, mother’s mother, sister’s son.” (The Latin system of kinship terms is an excellent example of the so-called Sudanese pattern.) Indeed, anthropologists use Latin kinship terms as the basis of a general terminology for cross-cultural use. Avuncular entered English in the first half of the 19th century.