Susanah is of Hebrew origin, meaning 'lily'. It's a variant spelling of Susannah, which also shares the same meaning and roots. The name Susanah has been popular throughout history, with notable figures such as Susanna White, one of the women who accused the Salem witches during the Salem witch trials in 1692, bearing this name.
The name Susanah had a consistent popularity over the years, with peaks in the mid-70s and early 2000s.