When Oebele Hilberts Mast was born on 13 March 1817, in Langezwaag, Friesland, Netherlands, his father, Hilbert Jacobs Mast, was 39 and his mother, Kornelia Jakobs van der Werf, was 36. He married Margjen Baltus Fenema on 7 June 1840, in Haskerland, Friesland, Netherlands. They were the parents of at least 6 sons and 3 daughters. He died on 21 August 1870, in Franeker, Friesland, Netherlands, at the age of 53.