"Blend of Kris and Ann"
The name Krisann is commonly a female name from the "American" origin.
Krisann is a modern American formation that joins Kris, a short form of Christine or Kristine, with Ann. The joined form first appears in US birth records in 1954, in the same period as other two-part American names built from a short form plus Ann, such as Joann and Deann. Neither element carries a separate meaning here beyond the names it draws on.
The pronunciation of Krisann is KRIS-an.