Family with parents
father Parents Henricus Franciscus JosephusSijses Maria Margarethaten Berge	Rudolphus Antonius AmbrosiusSijses 1854–1921
mother Parents Berend BerendsMaurits Antje BerendsSchakelaar	MariaMaurits 1855–1885
herself Family Hindrik JanDoff FreerkDoff Maria AkinaDoff JanDoff Private Private	Maria MargarethaSijses 1883–1960
younger sister Family (none)	NNSijses 1885–1885
Father’s family with Anna MargarethaMiljoen
father Parents Henricus Franciscus JosephusSijses Maria Margarethaten Berge	Rudolphus Antonius AmbrosiusSijses 1854–1921
step-mother Parents Petrus JohannesMiljoen Margaretha AlidaDriesens	Anna MargarethaMiljoen 1859–1909
half-sister Family (none)	NNSijses 1886–1886
half-sister Family EgbertPultrum AnnaSijses Henderikus JohannesSijses	Margaretha AlidaSijses 1888–1935
half-sister Family (none)	Hendrika Francisca JosephaSijses 1889–1890
half-brother Family Carolina JohannaSplit Rudolph Antonius AmbrosiusSijses Ida Wilhelmina ClasinaSijses Private	Henricus JohannesSijses 1890–1967
half-sister Family JacobKooistra Private	Wilhelmina HarmannaSijses 1895–1982
half-sister Family (none)	Gerritdina JohannaSijses 1896–1918
half-sister Family FrederikHuizinga	Helena CatharinaSijses 1898–1953
half-brother Family (none)	Rudolphus Antonius AmbrosiusSijses 1901–1901
Family with Hindrik JanDoff
husband Parents FreerkDoff AntjeZuidema	Hindrik JanDoff 1880–1967
herself Parents Rudolphus Antonius AmbrosiusSijses MariaMaurits	Maria MargarethaSijses 1883–1960
son Family (none)	FreerkDoff