Family name Реингард (Reingard 
, Реингард 
, Reyngard 
) , in the entire world, is a rare cognomen. The family name Реингард is habitual in Denmark, where it is a rare surname, Sweden, and Poland, where it is a very rare surname. Measured by absolute frequency, the name is most common in Poland, Germany, and Denmark. More frequently, Реингард is the forename as well as the last name.