He is married to Marie Frédérique Isabelle de MILLIJ VAN HEIDEN REINESTEIN.
They got married on November 11, 1901 at Zuidlaren Drenthe Netherlands, he was 30 years old.
Child(ren):
13C2R from Harco Attes Siccama (ca 1420 - 1511).
16C1R from Atte Harcoz Siccama (ca 1360 - bef 1440).
17C3R from Feye Sickingha (ca 1275 - ?).
The data shown has no sources.