https://screenrant.com/why-jesse-was-obsessed-with-elvis-in-full-house/

On Full House, Uncle Jesse was known for his deep love of Elvis Presley. However, Jesse's Elvis obsession also has a deeper real-life meaning.

Thanks for the news! To me, it is cool that John's Full House character was named after the twin sibling that I never knew that Elvis had.

God bless you and John always!!!

Holly