Perhaps in Europe, but globally, I can think of plenty of others off the top of my head: the various religions of Native Americans/First Nations peoples, the beliefs of Aboriginal people in Australia, even Japanese Shinto probably qualifies.
Shinto was in Japan before Buddhism. Zen took on a little bit of Shinto when it came over as Cha’an from China. In most Zen temples, there are a few statues of Shinto deities, but neither is an offshoot of the other.