I read this the other day as I perused the new fandangled web:
In the 1930s, German dictator Adolf Hitler found himself in the position of being extorted by his nephew over some dirty family secrets that threatened to bring down Der Fuhrer's regime. The threats brought the two Hitlers to conflict and compelled William Patrick Hitler to commit irrational acts.
Alois Hitler was Adolf Hitler's half-brother. Alois had gone to England in 1910 where he married an English woman and had a son named William Patrick Hitler who was born in 1911.
Alois abandoned his family in 1914 and returned to Germany where he married again bigamously. He never saw his son again until 1933.
Alois remarried in 1916 and had another son named Heinz.
How do they know these things?