Harald is getrouwd met Margrethe Kristine Jensen op 6 jan 1905 (civil) in Nylars (Bornholm, Den.). Margrethe (dochter van Mathias Christian Jensen en Dorthea Christine Nielsen) is geboren op 31 mrt 1884 in Nylars (Bornholm, Den.); is gestorven op 20 nov 1928 in Åkirkeby (Bornholm, Den.). [Gezinsblad] [Familiekaart]

1. Anna Margrethe Blem is geboren op 7 aug 1906 in Åkirkeby (Bornholm, Den.); is gestorven op 5 mrt 1996 in Rønne (Bornholm, Den.).
2. Ingrid Dorthea Blem is geboren op 12 aug 1907 in Åkirkeby (Bornholm, Den.); is gestorven op 16 jan 1951 in Rønne (Bornholm, Den.).
3. Markus Peter Blem is geboren op 16 sep 1908 in Åkirkeby (Bornholm, Den.); is gestorven op 19 jan 1982 in Nyborg (Den.).
4. Bodil Kristine Blem is geboren op 21 okt 1909 in Åkirkeby (Bornholm, Den.); is gestorven op 26 okt 1998 in Åkirkeby (Bornholm, Den.).
5. Mathias Kristian Blem is geboren op 18 jul 1912 in Åkirkeby (Bornholm, Den.); en is gestorven.

Markus is getrouwd met Julie Catrine Christine Larsen. Julie en is gestorven. [Gezinsblad] [Familiekaart]