Julia" is the John Lennon song about his mother.

Yes.

It’s on The Beatles’ White Album. John wrote it for his mother Julia, who was killed by a drunk driver when he was 17. The song is just his voice and an acoustic guitar, fingerpicked in a style he learned from Donovan. That lonely, delicate melody is what makes it haunting.

(He also wrote “Mother” later, on his first solo album, but that one is more about screaming at both parents. “Julia” is the quiet one.)