I don't recognise the above names because I have extremely limited information on this family, but, if you have a male De Wit (Christian name unknown) who was born late 1937 or early 1938 in Rotterdam, Holland - father was Chris Van Ettinger and the mother was Anneke De Wit.
I believe his parents married and that his father went into either a work or concentration camp and as far as I know was not heard of again.
I don't know if his mother married again either.
He would probably go under Van Ettinger or De Wit and would be about 61 years of age.
Can you be of any assistance with regards to your family being related or knowing of them?
Thanks, and I hope I might hear from you.