Simba's son...

Here is the scoop on Tanabi: After the Lion King came out,
an 'official employee' of Disney mentioned in a newsletter
of some sort something about Simba's cub at the end of the
movie, and called it Tanabi. Tanabi was never really an
official name, as it never appeared anywhere aside from that
newsletter and subsequent fanfictions written by subscribers
to said newsletter. There was a book series released around
the same time the Lion King came out detailing the exploits
of Simba's son, Kopa, called The Lion King: Six New
Adventures. Kopa, in my personal opinion, is more 'official'
than Tanabi, though in the end, neither is 'officially'
Simba's cub, since Kiara came into the picture...

a lion from the lion king ,i think

I had heard that Tanabi was just a Fan made name