The earliest known ancestor for the Boersema line is:
Roelof Eisses Boersema of the Netherlands.
He married Geertje Jacobs about 1800 in the Netherlands.
The only known child of Roelof and Geertje was Remke Roelfs Boersema.
She was born 8 September 1802 on the Isle of Schiermonnikoog, Friesland, Netherlands.
The last known Boersema was the above mentioned Remke.
She married Hindrik Willems Toren on 1 December 1822 at Ulrum, Groningen, Netherlands.