Rune of Vitae

A Rune of Vitae is a common (blue) rune that provides a small +10 health bonus. It stacks with itself and all other life boosting runes (unlike Vigor runes, which do not), and is thus commonly used on all pieces of armor not containing other runes. This rune can be used by characters of any profession.

Trivia

 * Vita is Latin for "life" whereas Vitae is either its plural form, or its singular genitive form, "of life." More than likely, the actual meaning is for the genitive.  In either case, the translated name would be incorrect.  "Rune of lives" or "Rune of of life" both are grammatically incorrect.