Jacob Tamminga, born circa 1845, merchant.

Jacob was married to
Beike van den Berg, born circa 1868 (?).

• 1 : Dirk Tamminga, born in Franeker on April 11, 1891, merchant.
  Dirk was married in Franeker on May 14, 1914, at the age of 23 to Tjitske Smidstra (aged 21 years), born in Burgwerd on May 14, 1893, daughter of Eeltje Tjerks Smidstra (farmer's hand and worker) and Sjoerdtje de Jong (maid servant).