Here are a few possibilities:
* Sommet: This word literally means "peak" or "summit" in French. It could be a last name, though it is not very common.
* Montagne: This means "mountain" in French. While not directly "peak," it clearly connects to the mountainous landscape.
* Pic: This word means "peak" in French, similar to "Sommet." It could also be a last name, although not very common.
* Cime: This word means "summit" in French. It is a less common word but could be a possible last name.
You might also find last names with components like "Mont" or "Roche" which refer to mountain or rock, suggesting a connection to mountains.
Ultimately, finding a French last name that means "mountain peak" is less about a direct translation and more about finding names that evoke that imagery or connection.