Brenley is of Scottish origin, derived from the Gaelic word "brean" meaning 'speckled' or 'pale'. It was originally a surname but has evolved into a given name in recent years. In Scotland, Brenley was traditionally used for both boys and girls, though it has become more common as a female name internationally. The name Brenley is composed of two elements: "brean" and the suffix "-ley", which denotes an association with or the condition of being 'speckled' or 'pale'. It is pronounced /ˈbrɛnli/.
The name Brenley experienced a noticeable increase in popularity between 2011 and 2012, with seven births recorded in 2011 followed by five births the next year. However, this trend did not continue as there were only five births each in 2014 and 2018. Overall, Brenley has seen a total of twenty-seven births over these years.