Tam Lin

Tam Lin, in one of many spellings, is a character in a legendary ballad originating from the Scottish Borders, mentioned in Cold Story.

Biography
Tam Lin is a young male stolen by the Queen of Fairies, under threat of being offered as a tithe to Hell. A young maiden or, alternatively, a young woman pregnant by him, rescues him at the last possible moment, by catching him off his horse and keeping him tight against all attempt to foil the rescue.

Cold Days
In Cold Days, Mab mentions him as the last person capable to stand up to her courtiers, implying that he was a Winter Knights.