Felix is Latin for fortunate or happy, and unlike many names built on virtue or lineage, it simply names a condition -- good luck, freely stated rather than earned through effort. The name carries a lightness that other classical names, built on duty or strength, tend to lack.
The Artist must know how to vary the planets significations according to the year wherein he writes, having still a regard to the grand Epoch of superior Conjunctions or Comets preceding. - William Lilly (1602.-1681.)