The article states he adopted the Christian name of Cristiano but I don't know of a saint my that name.
It would be interesting to know who he chose.
The letter he has distributed about his conversion says that “Cristiano” is his Confirmation name. A quick search doesn’t show any canonized saints with this name, but the Catholic Encyclopedia at NewAdvent.org is 100 years behind on saints. It does list one Bishop Christian, first Bishop of Prussia.
I assume “Cristiano” is in the class of names with “Fatima,” “Lourdes,” “Guadalupe” and so on - not the individual name of a saint, but a holy title. One of the converts who was confirmed at my church on Saturday night took “Fatima” as her name.
The practice of choosing the name of a saint has been abandoned for many years now. The current practice is to maintain one's own name, which is usually that of a saint. In Magdi Allam's situation, that was not the case. He went to the very top of the mountain and chose Christ. Bravo! My daughter chose 'Trinity' for her Confirmation name. I danced under the stars that night because she thought she had chosen the name of a character from the Matrix. After Confirmation, I filled her in on the true meaning of her new name :-) The Holy Spirit inspires us through whatever means possible.