Barbara, thank you for the suggestions. I have checked the LDS site and have also looked at the films they have on church records and census 1851. Some of the information on the LDS site comes from a cousin that got the information from me. She has done little research herself even though she is a member of the LDS. I have also been a member of Ancestry for a number of years. They have very little information for German research.
I have been researching this family for about 6 years and have not been able to find the information I need.
I do believe I have the right Linden because there are several Rohwold families listed in the church records (Saint Martins) but the Wilhelm I found that would have a birth date near mine died when he was 13 days old. Can you tell me where the other towns named Linden are located and I may be able to find Rohwolds there. Are they also in Hannover?
Rohwold is a very uncommon name and today there are only about 6 families in Germany with the name but have not been able to get any information from them.
Wilhelm also had a naturalization record but it said he received his naturalization from service in the Army but there is no service record.
The children listed on the LDS site are Elizabeth (my grandmother) and Sarah (Her sister). Both of their parents died when they were small so they did not have any information about them. They were orphans. Wilhelm and his wife are buried in GreenWood Cemetery in Brooklyn, NY. I have not found a obit for either one of them. I believe her family all died before she did and I don't think he had family in the US. I do have a copy of a will for both Wilhelm and his wife Rebecca.
Thank you again for your help.