"Heracles became Vajrapani, guardian of Sakyamuni. There is a wealth of material and studies on the subject... to explain how Heracles went from being a purely classical Greek figure to being a guardian god in the Buddhist pantheon." HSING, I-TIEN, and WILLIAM G. CROWELL. “Heracles in the East: The Diffusion and Transformation of His Image in the Arts of Central Asia, India, and Medieval China.” Asia Major, vol. 18, no. 2, 2005, pp. 103–154. JSTOR, [
www.jstor.org/stable/41649907]"
From Wikipedia. Vajrapani has also been connected to Zeus.