Namesakes
Petko Karavelov
(m) 1843-1903 
Bulgarian Presidents and Prime Ministers 1880-1881; 1884-1886; 1886; 1901-1902 (prime minister)
Pencho Zlatev
(a.k.a. Petko) (m) 1881-1948
Bulgarian Presidents and Prime Ministers 1935 (prime minister)