Alwyn is of Welsh origin and means "fair" or "bright". It was traditionally used as a surname before becoming more common as a given name, particularly for males, in the late 20th century. The name Alwyn is often associated with notable figures such as Alwyn Curran, a Welsh poet, and Alwyn Wright, an Australian cricketer.
The name Alwyn experienced notable popularity between 1915 and 1922 with consistently high birth numbers, peaking at 21 births in 1918. However, its usage significantly declined afterwards, fluctuating between 5 to 14 births per year until the late 1960s. Since then, it has rarely been given more than 10 times annually, with a notable spike to 28 births in 2021 and 21 births in 2022, suggesting a potential resurgence of interest in this name. Overall, there have been a total of 702 births named Alwyn from 1913 to 2023.