Dear Juergen,
Thanks for the information. I had no clue about the given name Gesina, sometimes Gesine. Thought it sort of sounded like Regina, and had noticed a Henry/Heinrich & Regina [Th???] as marriage witness' for my Lukas Feldhaus & Adelheid [Toebben/Tobben/Tobbe/Toben/Thoeben] and knowing she had a sister named Gesina and brothers called Herman and Bernard Heinrich, thought maybe were her sib or parents as witness'.
Was my thought that Gesina and Regina sort of sound alike perhaps interchangeable... LOL 
However, Gertrude makes sense as Lukas and Adelheid's did have grandchildren and greatgrandchildren called Gertrude. They themselves only had one daughter who died as infant named Anna Margarethe. Interestly my sister is called Anne Margaret which was purely coincidence.
Barbie
St. Louis