The Collaborative International Dictionary
Patronomatology
Patronomatology \Pa`tro*nom`a*tol"o*gy\, n. [Gr. path`r, patro`s, a father + E. onomatology.] That branch of knowledge which deals with personal names and their origin; the study of patronymics.
Wiktionary
patronomatology
n. The branch of knowledge that deals with personal names and their origin; the study of patronymics.