Is the 5.9l engine a hemi?

The 5.9L engine *can* be a Hemi, but it's not guaranteed. The 5.9L displacement was used in several engines, some of which were Hemi and some of which were not. The most famous 5.9L Hemi was found in Dodge Ram trucks. To know for sure, you need more information about the specific engine in question (make, model, year).