In the village of his mother, Vishovgrad, Petko saw nightingales (slavey in Bulgarian), which impressed him so much that he decided to change his family name to Slaveykov.
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In Istanbul Slaveykov issued the newspapers Gayda (1863-1867) and Makedoniya (1866-1872) and the magazines Ruzhitsa (1871), Pchelitsa (1871), Chitalishte (1872-1873), Zvanchatiy glumcho (1872), as well as the newspapers Shutosh (1873-1874) and Kosturka (1874).
Mrkvička came to Plovdiv in 1881 after an invitation by the then-Eastern Rumelian government and worked as a teacher in the Cyril and Methodius high school, where he co-operated with the most important cultural figures in the city — Ivan Vazov, Konstantin Velichkov, Petko Karavelov, Petko Slaveykov.