Last name Ирмгарда (Irmgard 
, Irmgarda 
, Irmingarda 
) , all over the world, is quite a rare cognomen. The last name Ирмгарда is habitual in Liechtenstein, where it is quite a common surname, Bhutan, and Poland, where it is quite a rare surname. In absolute terms, this name is the most popular in Poland, Spain, and Germany. Much more frequently, Ирмгарда is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Irmgard | Germany, Austria, Brazil, United States, Poland |
| Irmgarda | Croatia, Brazil, United States, Poland, Argentina |
| Irmingarda | Brazil, United States, Philippines |
| Ирмгарда | Kazakhstan |
Ermegarda, Ermengarda, Ermengarde, and אירמגרד