I am not a researcher of this surname however I came across obituary announcements in an old newspaper and felt it might be of some use to someone out there who is researching this surname. I saw your post and felt you may find this info relevant to your families.
The name of the newspaper was "Anti Masonic Star of New Oxford, Pennsylvania" and was dated Saturday, August 14, 1830. The announcement is as follows:
On Saturday night last, GEORGE son of Mr. HENRY DEGROFF, of the vicinity of this borough, aged nearly one year."
What is interesting about this announcement it doesn't mention the mother's name.Is this because she died in the birth and the child survived until the above mentioned date? The county was Adams county which was formed in 1803.