Elaine Seefeldt wrote: I just wonder if any were my ancestors.
and...
There is only one British arm of our "Seefeldt" family left and thats my son who proudly has the coat of arms on his wall and will be passed down to his children
I would suggest that you make it clear to your son that those arms don't necessarily belong to your branch of the family. Only that fact can be determined by professional genealogical investigation carried out by someone who is familiar with Germanic genealogical research. If your son just accepts it as being valid, he is only perpetuating the fraud that is conducted daily by 'bucket shops' purporting to sell you 'your family arms and history'.
I know my Oma and Opa moved to southern Germany but I presume they had sisters and brothers and I havent a clue where they landed up.
Whilst it is nice to have a Coat of Arms on view, one should always be careful in asserting that they are 'my family arms' without the necessary documentary proof to back up such a statement. There are always many urban myths that are associated with family history and they mean nothing at all other than what has been dreamt up over time - only proper genealogical research can prove such assertions, and when that happens, they are no longer urban myths, but established documentary facts.
When you mention "... I havent a clue where they landed up..." this doesn't really matter when genealogy of armigerous inheritance is concerned. What has to occur is that the paternal pedigree has to be back-tracked from you and your established details of existence. Only by doing this will you be able to correctly establish any link with the original armiger. Good luck with that as I know just how frustrating that research can be even with just one piece of the jigsaw being missing.
I had that problem with tracing back my paternal pedigree. To date I have managed to trace back by documentary evidence to the early 1490s, except for one marriage in the 1840s in England. Only last year I managed to ascertain that this marriage was solomnised in a Baptist Church in Bedfordshire, which is one of the non-conformist religions in the United Kingdom for whom details of births, marriages and deaths are not kept with the normal Church of England record repositries.