Dirk Tamminga, born in Franeker on April 11, 1891, son of Jacob Tamminga (merchant) and Beike van den Berg, 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).