Surname Dennesen (Dennesen 
) , all over the world, is a very rare cognomen. The cognomen Dennesen is characteristic of Netherlands, where it is a rare surname, Germany, where it is a very rare surname, and Malaysia. Measured by absolute frequency, it most frequently occurs in Germany, the United States, and Netherlands.
| VARIANT | COUNTRY |
|---|---|
| Dennesen | Netherlands, Germany, Malaysia, United States |