I had a great-uncle named Shimon (like the person whose tombstone is shown), who went by Sam.
I had another great-uncle named Shlomo, who also went by Sam.
My father-in-law is Shabse, and he too goes by Sam.
A common error in researching is to assume there is a one-to-one correlation of Hebrew and English name.

Shlomo Katz (named after the above-mentioned Sam, but do I not use that name) 
Silver Spring, MD