Jacob Slier and his wife had five children. Sara Slier was born in 1890, Leentje Slier was born in 1891, Wilhelmina Slier was born in 1893, Willem Slier was born in 1895 en Johanna Slier was born in 1902. They all lived at other addresses.
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The funeral records at the Jewish cemetery in Rotterdam reveal that Jacob Slier was buried there.