Inigo Lopez de Loyola was the birth name of Ignatius of Loyola
If you mean Ignatius of Loyola, his name at birth was Inigo Onaz Lopez de Loyola.
Percy Ignatius Weasley
Sophia is her real name.
Saint Monica
The following is from http://www.behindthename.com/name/ignatius:From the Roman family name Egnatius, meaning unknown, of Etruscan origin. The spelling was later altered to resemble Latin ignis "fire". This was the name of several saints, including the third bishop of Antioch who was thrown to wild beasts by emperor Trajan, and by Saint Ignatius of Loyola (1491-1556), founder of the Jesuits, whose real birth name was in fact Íñigo.
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