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man‎Sibbertus Kalksma‏‎, son of Jan Willems Kalksma and Dirkje Jans Dikhof‏.
Born ‎13 Nov 1850 Franeker

Married ‎6 Jan 1878 Franeker, age 27 years to:

woman‎Willemke Harkema‏‎, age by marriage 20 or 21 years, daughter of Klaas Willems Harkema and Sytske Elsinga‏.
Born ‎1857 Franeker