Prior to the 1970s, the name Chris was equally used for both boys (Christopher) and girls (Christine/Christina) while Kris was predominantly a girl's name (Kristin/Kristina/Kristine) but since the 1970s, the vast majority of Chrises/Krises are men due in large part of the rise in Chrissy/Christy?Krissy/Kristi. Thoughts?