Emma comes from a Germanic root meaning "whole" or "universal," and it's traditionally connected to completeness rather than any single trait. Historically the name carried an implication of quiet strength -- someone regarded as whole in herself, not defined by one virtue. That sense of wholeness has stayed central to how the name reads today.
Mars of a nativity, and not joined to good planets, signifieth the native to suffer by envy and hatred. - William Lilly (1602.-1681.)