originis
originis is a Latin form of origo, meaning “origin, source, beginning; birth, ancestry”. It is the genitive singular feminine noun.
Found 37 times in the Latin texts on Socratos.
Where it is used
Ovid, Fasti 2.399: at si quis vestrae deus esset originis auctor,
Horace, Sermones 1.2.55: ut quondam Marsaeus, amator Originis ille,
All forms of origo (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.