The name Siobhan is a girl's name of Irish origin meaning "the Lord is gracious". Siobhan and is often added to lists like Unique Irish Baby Names and discussed in our forums with posts like "Pick 5 (GIRLS)".
From the experts:
A lovely Irish name whose perplexing spelling has inspired many phonetic variations, but using the original form preserves the integrity of one of the most beautiful Irish girls' names.
The name of several early Irish queens, it was introduced to the American public by the distinguished actress Siobhan McKenna. There have been a wide variety of fictional Siobhans, from a Detective Sergeant in the John Rebus novels to a vampire in Stephenie Meyers's Breaking Dawn to a character in J. K. Rowling's The Casual Vacancy.