There is a common theory among fans of the Harry Potter series that the characters Voldemort and Dumbledore are related, either as distant relatives or even as father and son. However, there is no evidence in the books to support this theory.
Voldemort, whose real name is Tom Riddle, was born to a witch named Merope Gaunt and a Muggle father, Tom Riddle Sr. The Gaunts were a pure-blood wizarding family and were distantly related to the famed wizard Salazar Slytherin. There is no mention of any connection between the Gaunts and the Dumbledores in the books.
Dumbledore, on the other hand, was born to a wizarding family and was the elder of two brothers. He had a close relationship with his brother, Aberforth, but there is no mention of any other relatives. In fact, Dumbledore is often depicted as being a solitary and enigmatic figure, with few close connections to other characters in the series.
Furthermore, Dumbledore and Voldemort are depicted as being bitter enemies throughout the books. Dumbledore is the one who ultimately defeats Voldemort and saves the wizarding world from his tyranny. If they were related, it seems unlikely that their relationship would be so fraught with conflict.
Additionally, Dumbledore is known for his wisdom and kindness, while Voldemort is known for his cruelty and evil. It is difficult to imagine that the two could be related, given their vastly different personalities.
In conclusion, there is no evidence to support the theory that Voldemort and Dumbledore are related. Despite the speculation among fans, it seems unlikely that the two characters are connected in any way. The books do not provide any hints or clues to suggest a familial relationship between the two characters, and their relationship is one of bitter enemies rather than familial love.