Owen is traditionally traced to Welsh roots meaning "young warrior" or "well-born," though like many old Celtic names its exact derivation is debated among linguists. What tends to carry through is a sense of someone shaped early by responsibility -- young in years, perhaps, but not in bearing.
Saturn governs Contemplation and Memory, Mars boldness and fortitude, if they want not strength, or are ill disposed. - William Lilly (1602.-1681.)