Yasu is usually part of a longer name (either for man or woman) like Yasushi for a man or Yasuko or Yasue for a woman. In the case of Yasuko, it's often pronounced Yasuko (or Yazko)."Yasu" can mean "quiet/calm", "quiet down" or "keep (for a very long time)", depending on the kanji chosen.
"Yasu" can mean "quiet/calm", "quiet down" or "keep (for a very long time)", depending on the kanji chosen.