That's probably Borg, although he only won it four times.
There is no president who meets your criteria.
tyler
Some famous people with five letter names are Oprah Winfrey, Kanye West, and Tiger Woods. Many people have names with five letters, president Barack Obama's last name has just five letters.
Six states have five or less letters in their name. Iowa, Ohio and Utah have four letters in their name. Idaho, Maine and Texas have five letters in their name.
There are ten letters in George Washington's last name.
Robin
Matthew Champ's birth name is Matthew Stephen Champ.
Champ Bailey's birth name is Roland Champ Bailey.
five sides, 10 letters= pentagonal
Godworth
The Rodil is a Spanish river with five letters.
Champ!