Seraphina derives from the Hebrew seraphim, often translated as "the fiery ones," referring to a high order of angelic beings associated with burning devotion. The name is commonly read as carrying intensity and ardor -- passion understood as a kind of luminous energy rather than something to be tempered or subdued.
The lord of the second house hath the same strength in hurting, as the lord of the eighth; the lord of the sixth, the same with the lord of the twelfth. - William Lilly (1602.-1681.)