Looking for Ancestors Marthienssen
My 2xGreat Grandparents Carl Freidrich Martiens (ships carpenter) and Louisa Maria Martiens nee Zwicht.
They lived in Barth Germany in Abt. 1837. Known children are Johnann Heinrich born abt. 1832 Carl Johnannes born 1837 Barth, Germany and my Great Grandfather Vollrath Gustav Christian born 1840 Barth, Germany married Maria Sophia Wilhelmine Hahn in Barth, Germany.
Ther are still eight children missing to Carl and Louisa. We know one son went to the U.S.A . But we do not know his first names. The family changed there name to Martiensen.
Hope some one can help.