Haydyn is of Welsh origin, derived from the ancient Celtic word "haeduin" which means "from Havdin". This name was traditionally given to boys born near a place called Hafren, the old name for the River Severn in Wales. It is a rare yet distinctive name with a strong connection to Welsh heritage and history.
The name Haydyn has seen fluctuations in popularity over time, with peaks occurring around the late 2000s to early 2010s and a noticeable decline since then.