Lyam is a French variant of the name Liam, which itself is a short form of the name William. The name William originates from the Germanic elements 'wil' meaning 'will, desire' and 'helm' meaning 'helmet, protection'. Lyam, as a variant, carries the same connotations of strong will and protection. In medieval contexts, the term 'lyam' also referred to a leash, particularly in relation to a type of scenthound known as a limer or lymer, used for hunting large game.