Yes, in some fanfictions, Grindelwald can be portrayed as Harry Potter's grandfather. Fanfiction often takes creative liberties and rewrites the relationships between characters in the Harry Potter universe.
One implication could be a change in Harry's perception of good and evil. Since Grindelwald was a dark wizard, Harry might struggle with this new family connection.
If Harry Potter's grandfather was a mob boss connected to the Evans family, it would be a wild twist. It might mean that the Evans family had some secrets of their own. Lily Evans might have grown up with a different set of values or knowledge about the world. For Harry, it could mean that there were forces in the non - magical world that were still looking out for him, or perhaps even trying to use him for their own gain. It would definitely make for an interesting and darker take on the Harry Potter universe.
One possible plot could be that his grandfather, perhaps a powerful but reclusive wizard, trains Harry in unique magic from a young age. Harry might grow up with a different set of values and skills compared to the original story. He could have a closer bond with the wizarding world's older traditions.
There probably is. Fanfiction is a place for fans to re - imagine the stories they love. With Dumbledore as Harry's grandfather, it could mean that Dumbledore had a more personal stake in Harry's well - being from the start. It might also lead to different backstories for Dumbledore himself, like how his family ties to Harry came to be. It could even change the way the final battle against Voldemort plays out, as Dumbledore's family connection to Harry could bring in new elements of strategy or sacrifice.
It could be an old and powerful wizard who has been in hiding for years. Maybe he was a friend of Dumbledore's but had some differences with him, so he stayed away from the main events in Harry's life until now.
To write such a fanfiction, you could focus on the family secrets aspect. Begin by exploring the Evans family's connection to the mob - boss grandfather. Maybe Lily Evans was kept in the dark about it at first. Then, you can show how this impacts Harry's life. For instance, he discovers some old artifacts or letters that hint at the connection. As for the mob - boss part, you could describe his operations, like illegal magical - non - magical trade or protection rackets in the wizarding and non - wizarding worlds. This would add a lot of mystery and drama to the story.
It could be really interesting. There might be a lot more family - oriented secrets and revelations. For instance, Dumbledore could have been secretly guiding Harry not just as a mentor but as a family member all along. And Harry might discover some unique family magic that he inherits from Dumbledore's side of the family. Also, the relationship between Dumbledore and the Weasleys could change, as they would be related to Harry through Dumbledore.