When reading about this common wild flower on Wikipedia I found that this plant has lots of different names:

• wild pansy
• Jonny Jump up (also the name of yellow pansy)
• hearts ease
• hearts delight
• tickle-my-fancy
• Jack-jump-up-and-kiss-me
• come-and-cuddle-me
• three faces in a hood
• love-in-idleness
• pink of my john

Why all these different names I don’t know, these names was listed in the English translation of Wikipedia. In Norway the common name for these flowers is “night-and-day” or “flower of the stepmother”. I think the Latin name, Viola tricolor, suits this beautiful flower best.