Teknonymy
Teknonymy (from Ancient Greek: τέκνον 'child' and ὄνομα 'name') is the practice of referring to parents by the names of their children. This practice can be found in many different cultures around the world. The term was coined by anthropologist Edward Burnett Tylor in an 1889 paper. Such names are called teknonyms, teknonymics, or paedonymics.