Biblical name (probably meaning ‘descent’ in Hebrew), borne by a descendant of Adam (Genesis 5:15). According to the Book of Genesis, he became the father of Enoch at the age of 162, and lived for a further eight hundred years. This name was occasionally used by the Puritans. It was briefly revived in the 1960s and again more recently.
English: from the Norman personal name Serlo, Germanic Sarilo, Serilo. This was probably originally a byname cognate with Old Norse Sorli, and akin to Old English searu ‘armor’, meaning perhaps ‘defender’, ‘protector’.