Valentina comes from the Latin valens, meaning strong or healthy, and the name is traditionally associated with vigor and robust vitality rather than delicacy. It's often read as suggesting resilience of body and spirit together -- strength understood as a kind of wellbeing, not merely physical force applied outward.
The Moon is in conflict with those who are ruled by Mars, and Mars is in conflict with those ruled by the Moon. - Picatrix (Andalusia, ~1000.AD)