 He was the son of merchant Wilhelm Mohr (1820–1880) and Antoinette Ulrikke Mowinckel (1823–1894).He was the brother of jurist August Christian Mohr (1847–1918).He was the father of Wilhelm Mohr (1886 –1978) and Anton Mohr (1890–1968), and grandfather of Wilhelm Mohr (1917–2016).