Is the love for combat sports inherited?

Neither of my two siblings nor parents showed any interest in combat sports. I was the supposedly the only one with that passion. I've been taking both MMA and Judo classes for nearly 5 months now.

Then I just learned recently my great-grandfather was into MMA and Muay Thai. Coincidentally, he was my same age when he started training; 19 years old. Do you some things like the love for combat sports inherited? Like me, he was the only one in the family with that passion towards it.
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Even when I've come home with bruises and some cuts, I'm persistent. A couple relatives even said it's like seeing his attitude all over again, as if they were talking to him in female version.
Is the love for combat sports inherited?
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