""Hayden/Jayden/Kaiden/Aiden""
What one do you think is made up? 
""I do suspect that the biblical name Jadon is coincidence though.""
From an African American pov, the slaves were made to take on Christianity and would know the Bible well. They quite understandably changed spellings and now it is a valid name, as is Catherine, which isn't the original English spelling and many other names that have been changed and used globally.
Another vote for Henry.