See also the related form, Ioan (Greek, Romanian, Slavic, and Welsh).
Yoan is uncommon as a baby name for boys. It is not listed within the top 1000 names. In 2018, among the group of boy names directly related to Yoan, John was the most frequently used.
Baby names that sound like Yoan include Yan (German, Russian, and Slavic), Yann (Breton, French, and German), Yen (Vietnamese), Yon (Basque), Yuan (Manx), Yun, Yune, Euen (Scottish), Jaan (Estonian and Russian), Jahn, Jann (English and German), Yacheem, Yachim, Yameen, Yamin (English, Hebrew, and Indian), Yanae, Yanai (Hebrew), Yani, Yanni (Greek, Breton, and Dutch), and Yannie.