Who is the true father of Brightheart, Thornclaw, Cinderpelt, and Brackenfur? Is it Lionheart or Brackenfoot?

Lionheart, you are most likely the father!

The Erin's have never truly confirmed who their father was, but the more likely choice is Lionheart. Whitestorm, the other rumored cat to be their father, wouldn't make sense since Whitestorm was Brightheart's mentor.