Anthony Adverse a novel by Hervey Allen, published in 1937.
Child of fortune. Conceived in France, born in an Alpine village, reared in a great house of Italy, Anthony never knew his parents, never had a name of his own. But he was born of passion and it filled his blood.|Goodreads|

Volume 1. The Roots of the Tree
Volume 2. The Other Bronze Boy
Volume 3. The Lonely Twin