As a subject matter expert in the Marvel Universe, I can provide you with an accurate answer to your question.
Ronan is not the son of Thanos. Ronan the Accuser is a character from the Marvel Comics, and he is a Kree, a member of the Kree race, not related to Thanos, who is an Eternal. Thanos is a supervillain known for his quest to collect the Infinity Stones and is the son of A'lars and Sui-San, both Eternals. While both characters exist within the Marvel Universe and have been portrayed in the Marvel Cinematic Universe (MCU), they are separate entities with distinct backgrounds and storylines.
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