A Song of Ice and Fire character, Lyanna Stark was Eddard Stark's younger and only sister, and the betrothed of Robert Baratheon, who adored her, though it is mentioned that Lyanna was not quite so enthusiastic about the betrothal.She was known for being headstrong, spirited, and beautiful; Eddard's daughter Arya Stark is often compared to Lyanna for their similar personality and appearance.Source:Wikipedia

More names for your cat:

Other cats named Lyanna

If this is the name of your cat, upload a photo :)