Yokoyama rhymes with:
koyama, koyama, oyama, toyama, akiyama, aoyama, fujiyama, fukuyama, hirayama, kashiyama, katayama, koyama, kuriyama, maruyama, nakayama, nishiyama, oyama, sasayama, sugiyama, takayama, tokuyama, toyama
Yokoyama sounds like:
yacono, yakima, yasin, yasmin, yasmine, yassin, yesen, yoakam, yoakum, yocam, yocham, yochim, yochum, yocom, yocum, yogiism, yokohama, yokum, yoshino, yquem, yukon, yusen