Dayum..thanks for this tidbit..

Yes there are several book about this, Alois Hitler, Aldolf's paternal half brother moved to the UK in the pre first world war days and married a Liverpool woman named Bridgid (or Briget by some sources) Elizabeth Dowling an Irish catholic woman. Adolf Stayed with them between 1913 and 1914 when he was still aspiring to be an artist,
When war broke out Adolf returned to Germany to serve in the Millitary and Alois and Briget emigrated to the USA where they settled and started a family changing their name to Shicklegruber Alois paternal Grandmother's maiden name. A wise decision as things turned out.
Their son served in WW2 a s a navy seaman and almost died in combat, he later married and had two sons of his own but never told them who their Uncle was.
In the 1980s a Journalist tracked them down and told them of their Great Uncle, one of the nephews who was a serving FBI agent confirmed it and both swore an oath never to have children, changed their names again and vanished, so that the Hitler bloodline would come to an end.
They could still be alive but would be at least in their 70s now.

Knew that

That's like Trump's niece.

Interesting history. Thanks for posting.
Conscientious of his sons to decide not to have children.