Surname Ilgmann (Ilgmann 
) , worldwide, is a rare last name. The cognomen Ilgmann is habitual in Germany, where it is a rare surname, Finland, where it is a very rare surname, and Poland. Measured by absolute frequency, this name is the most popular in Germany, Poland, and South Africa. Much less frequently, Ilgmann is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ilgmann | United Kingdom, Poland, Finland, South Africa, Germany |