I always assumed his bloodline died out but I wasn't sure. And if so would they really keep the last name?
Hi, you may be interested in these earlier posts
What happened to other people with the surname Hitler with the end of World War II? featuring /u/commiespaceinvader
After Hitler died and WW2 ended, what happened to the Surname 'Hitler'?
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That would surely depend on the closeness of their blood relation.