Two Time Travellers

Poul Anderson's Jack Havig, Philip Wylie's Hugo Danner and Jerry Siegel's and Joe Schuster's Clark Kent grow up in small American towns hiding their powers.

Havig: time travel.

Danner: strength and speed.

Kent: strength, speed and more.

Kent's powers increased as his series progressed. For a while, by flying faster than light, he was able to time travel. An editorial reply to a reader's letter disclosed that he travelled into the future by spinning clockwise and into the past by spinning anticlockwise. 

Danner's powers probably influenced Kent's and, for a while, Kent's powers included a duplication of Havig's. We find some obscure connections between fictional characters.