Saint Genevieve. People did not use last (family) names at the time.
Sophia is her real name.
Saint Monica
Which Saint Francis? There are several.
Saint Adamnan of Iona is his real name.
her real name was clarrissa but they shortened it
Saint Sebastian's real name was Sebastian. He was a Christian martyr and soldier who lived in the 3rd century AD.
Leo was his real name. Popes were using their birth name at the time.
There is no saint named Libby. However, the name derives from Elizabeth and there are a number of saints by that name.
Sir Thomas More
Barbara amos
Saint Nicholaus
Saint Nicholas