Nearly Headless Nick explained to Harry that only those who were afraid to move on stayed behind as ghosts. Fred was very brave and knew he could be killed when he battled the Death Eaters at Hogwarts. He died a brave death standing up for what he believed in. I don't see any reason he would be afraid to move on.
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While it is never confirmed, it is highly unlikely since the people who become ghosts are the people who were afraid to move on. Fred Weasley opted to fight in the final battle and knew there was a high chance of being killed so he probably wasn't afraid to move on.
Fred Weasley was never mentioned as having a scar over his eyebrow.
Fred Weasley's Favorite color is blue.. Was that help?
George Weasley married her. Fred Weasley died.
No, he was killed in the final battle at Hogwarts.
Arthur Weasley - father Molly Weasley nee Prewett - mother William 'Bill' Weasley - son Charlie Weasley - son Percy Weasley - son Fred Weasley - son George Weasley - son Ronald 'Ron' Weasley - son Ginevra 'Ginny' Weasley - daughter In the later Weasley family, it's: Ronald Weasley: Husband/father Hermione Weasley:Wife/mother Rose Weasley:Daughter Hugo Weasley:Son And there was another son which I don't exactly remember!! SORRY