From Tolkien Gateway

What it comes to the year of birth of Maglor (and other sons of Fëanor), I wouldn't mention the year Y.T. 1497: their father was born in Y.T. 1179 (Annals of Aman §78, HoME X, p. 92), and they were first mentioned in annals in Y.T. 1490 when they followed their father Fëanor to exile to Formenos (Annals of Aman §99, HoME X, p. 96). They were quite probably born much closer to the year Y.T. 1179 (in "Of the Laws and Customs among the Eldar" it is told that they usually married soon after their fiftieth year and "their time of generation was in their youth and earlier life" (HoME X, p. 210. 212). Fëanor and Nerdanel were a unique exception with their seven children but still the terminus ante quem is clearly Y.T. 1490. --Tik 10:09, 9 October 2016 (UTC)

I can find no source for this line in the first paragraph, having checked the Silm and PoME: "He had more of his mother Nerdanel's gentle spirit than any of his brothers." 1) Nerdanel is never described as having a gentle spirit; 2) Maglor is never explicitly said to be one of the sons to whom Nerdanel bequeathed her mood to in part. Does anyone have a source? If not, I think the line should be deleted. Undercat 17:40, 19 August 2022 (UTC)

Great catch Undercat! If you have the time, go ahead and remove it just to be safe. It looks like that statement's been hiding in there for a long time, back when we weren't as strict with references. --Hyarion 17:49, 19 August 2022 (UTC)