What is the Yiddish equivalent of name Richard?

There isn't a direct equivalent of the name "Richard" in Yiddish. However, there are a few options depending on the specific meaning you're looking for:

* Rikard: This is the most common Yiddish transliteration of "Richard." It's used in both Ashkenazi and Sephardi Jewish communities.

* Reuven (רִבְעֵן): This name means "friend" or "companion" in Hebrew, which could be seen as a similar concept to the meaning of "Richard," which is "strong ruler."

* Richer (ריכער): This is a surname that could be interpreted as a variation of "Richard."

Ultimately, the "Yiddish equivalent" of Richard depends on the specific nuance you're trying to capture. You could also consider using a Hebrew name with a similar meaning or sound to "Richard," such as Yitzchak (יצחק) which means "laughter" or Refael (רפאל) which means "God heals."