The name Liam is actually an anglicized form of the Irish name "Uilliam," which is the Irish equivalent of the English name "William". In Irish, Liam is spelled "Liathmhaith". However, it's worth noting that "Liathmhaith" is not commonly used as a given name in modern Irish. Instead, the Irish equivalent of the name Liam is often spelled and pronounced as "Liam" in modern Irish.