Complex sentence: Despite being christened "Emilie", Colbert was called "Lily", because Colbert had a aunt who lived together, grandmother's adopted orphan, Emilie Loew, who never married.
Split into simpler sentences: Despite being christened "Emilie", Colbert was called "Lily". Also Colbert had a aunt who lived together, grandmother's adopted orphan, Emilie Loew, who never married.