How close together in time are the signatures? And what kind of documents are they on?
To my untrained eye they look as though they could easily have been written by the same hand.
I think those signatures look the same.
Yes, I do think the signatures belong to the same person, they may not be as uniform as you expect them to be, but that is probably due to the fact he was signing a recently adopted name.
He was a Jamaican man named Barrington H Smith, iirc.
And on second thought, if you had the wit to crop the three signatures, why not reduce the size and show the entire Social Security documents? I don’t get it...who signs the same application three times?