That was never given in the original books.
The only mention of Tarzan's uncle is the 21st century adaptation of Tarzan by Warner Bros. His name was Richard Clayton.
Tantar
cheetah
his father's name is kerchak
turk the gorilla
His name is "Boy".
John Clayton, Lord Greystoke.
Tarzan's elephant friend is called Tantor.
Bullroarer
It is not a skirt. It is called a loincloth.
jorge
Claudius
boy / Jane