Many groups of people in Hungary were left in the cold because of moving land borders.
My grandmother was born in Austro-Hungary and my father in Poland. Both were born in the same house.
My husband's step-father was German but his family lived in Erdely for ages.
After WW11 they were removed from the land and homes and moved to Hungary.
Had to start over again after his 5 or 6 years in a Russian POW camp, forced labor in a mine.
Came home to his land in Erdely to find another man, his wives new husband in his home with their new child.
He left on his own, gave them everything but still had to leave the area because he was German by blood.
I may just look at my files where i have stored the family tree from my father's side.
Goes back nearly 300 years and there are tons of Hungarian surnames in the mix.