BOTH Robert the Bruce and King Edward Longshanks of England are 20th Great grandfathers.... making them equally close, both through my mother.
Methven, 24 deg, 1st cousin, James Douglas, 19 deg, 19th great-grandfather, Alexander Fraser, 22 deg, 20th great-grandfather, Edward Keith Marischal - 21 deg, 20th great-grandfather, Andrew Leslie VI - 21 deg, 21st great-grandfather, David, Lord of Crawford & Byres - 21 deg, 19th great-grandfather, Joan Menteith, Countess of Strathearn - 21 deg, 19th great-grandmother, Agnes Randolph, Countess of Dunbar, 21 deg, 18th great-grand-neice, William, 3rd Earl of Ross, 23 deg, 21st great-grandfather, Henry Sinclair II of Roslin, 22 deg., 20th great-grand-father.
As one can see from my connections...I am (rather) connected to the listed people in the Declaration of Arbroath, being mostly directly descended.