That every individual soul has a guardian angel has never been defined by the Church, and is, consequently, not an article of faith; but it is the "mind of the Church."
How can I tell my four-year-old grandson about his guardian angel
Saint Michael in the Catholic Church - Wikipedia
Guardian Angels - Our God-Given Bodyguards - Roman Catholic Man
Guardian Angels: Why You Shouldn't Name or Discover Them
Are We Not to Name Our Guardian Angels?
What Do The Names Of The Archangels Mean? - Catholic-Link
Is Uriel the Angel of Death? - Quora
Life In Christ: A Catholic Catechism for Adults
Encyclopedia of Angels: Webster, Richard: 9780738714622
Angel and demon, Definition, Nature, Types, & Facts
Do Guardian Angels Exist?