There are two places in Lower Saxony called Wehldorf.
- Wehldorf, municipality of Beverstedt, rural district of Cuxhaven
- Wehldorf, municipality of Gyhum, rural district of Rotenburg/Wümme
The profile says Wehldorf/Gyhum, but are you sure it's really this place? Gyhum would also be the relevant Protestant parish. However, there are no church records online available for Gyhum for the year 1866 either on archion, ancestry or FamilySearch.
This means that the date or the parents cannot be checked online at present.