Alexander is built from Greek roots meaning "to defend" and "man," commonly translated as "defender of men." The name has carried that protective sense through millennia of use, from ancient conquerors to modern namesakes, and it tends to suggest someone who shields others rather than merely leads them.
Mercury in the sixth house of a nativity, the native shall change from one religion to another, & will have his felicity in part impedited by reason of his inconstancy. - William Lilly (1602.-1681.)