Last name クラム (Crum 
, Crumb 
, Clum 
) , globally, is a common surname. The family name クラム is characteristic of Cayman Islands, where it is quite a common surname, the United States, where it is quite a rare surname, and Netherlands. Not in comparison with a country's population, this name is the most popular in the United States, Canada, and Netherlands.
| VARIANT | COUNTRY |
|---|---|
| Crum | Australia, Canada, United Kingdom, United States, Netherlands |
| Crumb | Australia, Canada, New Zealand, United Kingdom, United States |
| Clum | Canada, New Zealand, Brazil, United Kingdom, United States |