Surname Guinther (Guinther 
) , all over the world, is a rare family name. The surname Guinther is habitual in the United States, where it is a rare surname, New Zealand, and Brazil. Not in comparison with a country's population, this name is the most popular in the United States, Brazil, and Canada. Very seldom, Guinther is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guinther | Canada, Argentina, Brazil, New Zealand, United States |