 Reimann was born in Hahndorf, South Australia, second son of Bertha Leontine Reimann, née Schröder, and (Karl Friedrich) Eduard Reimann, a farmer, who arrived in South Australia on the "Emmy" from Hamburg in January 1850.He began studying singing and piano under T. W. Boehm at his Hahndorf Academy, and Mrs. B. J.Price.