Roosevelt is the most interesting to me. It's a name I feel you definitely wouldn't use without intending to reference the president, and at the point of its peak it could only have been referencing Teddy. People must have really loved the guy! But so much more than, say, Washington?
Then again the data only starts at 1880. Maybe Washington was even more popular closer to his presidency.
-----
https://www.behindthename.com/pnl/120652