IGI online gives following information:

JOHN ROBERT COWELL - Christening: 08 JUN 1858 Saint Marks, Isle Of Man
Mother: Charlotte Cowell

No father's details are given, but it was the norm for illegitimate children to go by their father's name so it would be safe to assume he was a Steele. Not sure how you would find out who though, perhaps someone else can help you with that.

Marriage record for John might give father's name?