Over a million. Or at least 1000's. Leonardo is my favorite boy name because of my favorite actor Leonardo DiCaprio. I don't want children but if I had a son I would name him Leonardo.
There are no statistics for how many boys in the world have the name Taylor. In the United States there have been over 100,000 boys named Taylor since 1880.
Hopefully none.
2 boys, one girl
There are many things that people named Leonardo have done that are important. However, without a last name it is impossible to point out specific activities that were important.
There are 88 named constellations.
How many constellations have been formally named by the IAU and lies in which hemisphere
There have been no popes named Kenneth.
There has been to date 8 Kings named named Henry
Luna had twin boys. They were named Lorcan and Lysander Scamander.
There are 66 Hardy Boys books in all.
He has never been married.
Many artists have been inspired by science, but you are probably thinking of Leonardo daVinci.