Family with parents
father Parents Henricus Franciscus JosephusSijses Maria Margarethaten Berge	Johannes JacobusSijses 1855–1917
mother Parents Harmde Waard Hemke TammesHoutgast	Gerardinade Waard 1858–1926
elder sister Family Heinrich HermannTreu Hermann AndreasTreu Gerardina Grietje“Dinie” Treu Johannes Jacobus“Joop” Treu	Maria Margaretha“Mies” Sijses 1879–1972
elder sister Family Hendrikus JohannesPeletier Hendrikus Johannes“Henk” Peletier Johanna Jacoba“Annie” Peletier Gerardina JohannaPeletier	Hemma Gerardina“Emmy” Sijses 1880–1959
elder sister Family Frederik“Fre” van Dijk Tjeerco Johanvan Dijk	Henderika“Riek” Sijses 1882–1956
elder sister Family Johannes Wichertvan Goozen Johanna Wilhelmina“Minie” van Goozen Johannes Jacobus“Joop” van Goozen	Harmina“(Her)mien” Sijses 1882–1958
elder sister Family (none)	Anna CatharinaSijses 1884–1933
elder sister Family (none)	NNSijses 1886–1886
elder brother Family (none)	Johannes HenricusSijses 1888–1889
herself Family Hendrik JohannesSijtsema Private	Gerardina Johanna“Dien” Sijses 1889–1964
younger brother Family Maria Anthoniade Ronde Johannes JacobusSijses Anna MariaSijses Gerard PieterSijses Private MarianneSijses	Johannes HenderikusSijses 1894–1954
younger sister Family Petrus“Pe” de Vries Private	Helena“Lena” Sijses 1894–1962
younger sister Family Dominicus Johan Frans MariaSprock Private Johannes Frans Dominicus“Joop” Sprock Gerardina Johanna“Dinie” Sprock	Margaretha“Greta” Sijses 1895–1971
younger sister Family (none)	TammolinaSijses 1897–1897
Family with Hendrik JohannesSijtsema
husband Parents Johannes MartensSijtsema AlberdinaJongbloed	Hendrik JohannesSijtsema 1889–1932
herself Parents Johannes JacobusSijses Gerardinade Waard	Gerardina Johanna“Dien” Sijses 1889–1964
son Family (none)	Private
Hendrik JohannesSijtsema + AkkeBijlsma
husband Parents Johannes MartensSijtsema AlberdinaJongbloed	Hendrik JohannesSijtsema 1889–1932
husband’s wife Parents (unknown)	AkkeBijlsma 1890–1920
step-son Family (none)	Johannes Marten“Joop” Sijtsema