John Vincent Atanasoff was born on October 4, 1903 near Hamilton, New York. His father, Ivan Atanasov, was a Bulgarian immigrant born in the village of Boyadzhik, Yambol region, then in the Ottoman Empire. Ivan's parents died in 1876, at the height of the April Uprising, so in 1889, at the age of 13, he emigrated to America with his uncle. He met John's Iva Lucena Purdy, an English teacher from upstate New York, and they got married in in 1900, following John’s graduation from Colgate College with a degree in philosophy.

Ivan and Lucena's son John became interested in mathematics and logarithms at an early age. He was later recognized as the inventor of the computer. More information on the subject can be found here.