Harry Potter's daughter is named after his partner luna lovegood, and Luna is also a good friend of Harry. He invited Luna as his partner in Half-Blood Prince, and in Deathly Hallows, Luna reminded Harry to find Ravenclaw's crown, which was very important to him. Maybe it's a thank you to his friend.
Extended data:
Lily is the name of Harry's mother lily potter (Lily Evans before marriage). She is still so modest and worried that her sister petunia evans will be jealous. Her love for James Potter made him less frivolous and arrogant. Her encouragement to remus lupin taught werewolves how to see their advantages for the first time.
Her friendship with severus snape made this indifferent man silently protect Harry's safety after the death of the Potters. At the age of 265,438+0, she sacrificed her life to protect Harry when she could have lived.