Daily Ancestorconsobrinus
Consobrinus is Latin for first cousin (feminine consobrina), a child of a parent's brother or sister.
Consobrinus means a cousin, and the feminine is consobrina. Strictly it meant a cousin on the mother's side, but writers often used it for any first cousin, so it does not prove which side of the family the link runs through.
Since first cousins needed a dispensation to marry in the Catholic Church, the word also appears in marriage entries alongside consanguinitas.
As seen in a recordWitness in a Latin marriage entry
testis: Paulus Weber, consobrinus sponsae
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Daily Ancestor. "consobrinus." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/latin/consobrinus. Last checked 2026-10-01.