When I was living in London I knew a boy called Richard Richards ! Can't think of any more double-ups.
Being Welsh I have the usual Owen Owens, Robert Roberts, Hugh Hughes, William Williams and Thomas Thomas - headches to find every last one of them.
Unusual names are :
Eupham (f) 1775
Hardic (f) 1760
Ciesel (f) 1745
Septimus (m) 1915
Moses (m) loads of them
Ranulph (m) 1963
Mairin (f) 1687
Falcus (m) 1916
Grizel (f) 1796
Alwena (f)
Eirianwen (f)
Mennai (f)
Rhodri (m)
Rhydian (m)
Enrick Hainse (m) 1963
Laverin (m) 1680
Alphaeus (m)
Obadiah (m) 1871
Now (m)
Euros (m)
Gwawr (f) 1991 - means dawn in Welsh
Lowri (f)
Elma (f) 1910 & 1960
Annice (f) 1964
All my Mother in laws sisters were named after flowers - Bluebell, Pansy, Violet, Rose & Blossom
My most common names are:
Scotland - Alexander, Hugh William Elizabeth and Mary
Wales - Owen, Thomas, William, Robert, Mary, Elizabeth Margaret
England - James, Robert, William
Carol