Gerrit Boeser (1786-1848) married 2 sisters

Painter Daniel Boeser (1757-1812) and his wife Sijchie Paardekooper (1769-1836) had their second son, Gerrit, baptised on 28 May 1786 in Beverwijk in Holland. The couple had a total of 11 children, but some of them died young. In addition to an older brother Wouter Boeser (1785-1859), Gerrit also had younger brothers named Jan Martinus Boeser (1796-1851), Johannes Boeser (1799-1872) and Hendrik Daniel Boeser (1801-1842). Around 1792 the family had moved from Beverwijk to Rotterdam.

Gerrit was the first of his siblings to marry. He married Pieternella Brand in Rotterdam on 13 August 1809. Pieternella was baptised on 6 October 1782 in Kralingen (now part of Rotterdam). Her parents are Heiltje Vrooman (1748-1815) and Arij Brand (1747-1814). Two elder siblings had also been named Pieternella, but they had died young.
Pieternella Brand gave birth to a daughter Sophia Cornelia who was baptised on 1 October 1809 in Haarlem. In 1811 and 1814 in Rotterdam they had sons who both died young. Pieternella died on 25 may 1816 in Rotterdam, aged 33.

Pieternella Brand, wife of Gerrit Boeser, died on 26-5-1816 in Rotterdam

Gerrit Boeser then married Pieternella's elder sister Dirkje Brand on 13 August 1817 in Rotterdam. Dirkje was baptised on 25 January 1778 in Kralingen. She had first married Machiel Jurriens who had died at the age of 34 on 8 November 1811. They had a daughter Heijltje, born on 3 July and baptised on 18 August 1805 in Rotterdam with witness Heijltje Vrooman, the maternal grandmother. Dirkje was 39 years old at the time of her second marriage, and she had no further issue.

Gerrit's daughter Sophia Cornelia was married on 9 November 1836 in Rotterdam to blue-eyed Christiaan Gerardus van der Leck (1807-1878), widower of Anna Barbara Clement. After 5 pregnancies Sophia Cornelia had 2 surviving children: Gerrit (1837-1913) and Pieteronella (1843-1909) van der Leck.
Dirkje's daughter Heijltje was married on 13 June 1838 in Rotterdam to Willem Eichman (1811-1903) who originated in Leiden. Their eldest child was Josina Cornelia Eichman (1839-1879).

Dirkje Brand died on 12 June 1844 in Rotterdam, aged 66. Four years later, her widower Gerrit Boeser died there, at the age of 62, on 19 August 1848.
Gerrit's daughter Sophia Cornelia Boeser died there on 2 March 1869 at the age of 59. His stepdaughter Heiltje Jurriens died in Rotterdam on 7 November 1886, aged 81.

Sources: StadsArchief.Rotterdam.nl, WieWasWie.nl.