My (23F) uncle (50sM) who I barely know offered to pay off all my student loans

I am currently in my first year of medical school in the US, which is EXPENSIVE. Even though I have a 50% scholarship, I'm still going to have to take out ~$35,000 in loans each year, meaning I can expect to have ~$150,000 in student loans by the time I graduate (fortunately, I have no undergraduate debt as I attended on a full scholarship). It's a sizeable sum, and I'm not super happy about taking on all this debt. But being a doctor is a stable, well-paying career, and I'm sure I'll be able to pay it off eventually as long as I am responsible with my finances.
Recently, an uncle of mine (my father's brother) contacted our family and offered to fully cover the cost of my medical education. We always knew he was rich, but we never imagined he was THAT rich. On one hand, it's a very generous offer and I know I should be grateful. But, on the other hand, this feels super weird to me. I've only met him two times in my life (he lives in a different country). Sure, we're related, but what kind of person gives a 6-figure gift to a girl he doesn't even know? He says it's just a gift, but I feel like there HAVE to be strings attached to a gift as large as this. I also don't trust him or believe he's a good person -- his previous two wives divorced him because he abused them. My family insists the women were just "overreacting", but I feel like two women divorcing him for the same thing can't be a coincidence. And my family comes from a conservative culture where divorce is a HUGE scandal, which is also why I don't believe the divorces were a simple "overreaction". But I also don't really know the details, because, like I said, he lives in a different country and we never talk. I just have a really bad feeling about him and would prefer to do things the official way, using the federal student loans I've been approved for, where at least I know what I'm signing up for and what the terms of the agreement are. I also don't want to take money from a probable domestic abuser.
But am I just being neurotic and paranoid?? Should I stop looking a gift horse in the mouth? He's already transferred the first $35,000 to my parents' account, and they're pressuring me to send his money to my school already. My parents are really frustrated with me for my hesitation and telling me to just stop overthinking and accept the gift already. Are they right?? What should I say to them?
EDIT: Sorry, I should have been more clear in my original post. I'm honestly not too worried about myself -- I know what my rights are, and I have no particular emotional connection to my uncle, so if he tries to make me do something I'm uncomfortable with, I have no problems with telling him to **** off. What I'm most concerned about is the influence this will have on my dad. He really is the sweetest, gentlest man, but he's also very naive and trusting when it comes to his family and friends. This has caused him to get screwed before. My uncle's involved in some shady/corrupt business deals that he's gotten other relatives tangled up into, and I'm afraid he's going to use this gift as leverage to drag my dad into his mess as well.
TL;DR skeevy uncle I barely know offered to pay for the cost of my 6-figure medical education. I feel uncomfortable and don't want to accept, but my parents really do. I'm not sure what to do about this.


Source.