The DeBerg family name is a derivation of the Netherlands Von deBerg.The branch that emigrated to the USA came from OstFriesland, Germany.So far, all DeBerg's I've documented are related to this group.
The St. Clair branch originated in Scotland and started in the USA as "Sinkler".The best source of information on this Branch that I know of is Jean Grigsby.
Connecting surnames include; DeVries, Brown, Tilson, Betts, and White.
The Tilson branch goes back to 1638 (well documented).Other branches go back further but documentation is sketchy and I consider it very unreliable.
Most of the recent family member information in my files is based on casual family sources and should never be considered the final authority.All information I have is available for your use.
Please notify me of any errors so that I can correct them.