Арнульф Каринтийский
Louis was born in September or October 893 in Altötting, Duchy of Bavaria. He was the only legitimate son of king Arnulf of Carinthia and his wife, Ota, a member of the Conradine dynasty. He had at least two brothers: his elder, illegitimate brother Zwentibold, who ruled Lotharingia, and another brother named Ratold, who briefly ruled Kingdom of Italy. Ratold's maternity and age are unknown.