At the age of four, the doctor diagnosed a heart defect and "stunted thyroid gland" in little Jaroslav. Because of this, he spent a lot of time in the country, with his grandfather from his mother's side, in the so-called Ražice dam-house, especially with his younger brother Bohuslav. In his childhood, Jaroslav was jealous of Bohuslav and even tried several times to hurt him as a baby. Later they had an extremely strong relationship and traveled together a lot on foot. Bohuslav drank himself to death one year after Jaroslav's death.
At the age of four, the doctor diagnosed a heart defect and "stunted thyroid gland" in little Jaroslav. Because of this, he spent a lot of time in the country, with his grandfather from his mother's side, in the so-called Ražice dam-house, especially with his younger brother Bohuslav. In his childhood, Jaroslav was jealous of Bohuslav and even tried several times to hurt him as a baby. Later they had an extremely strong relationship and traveled together a lot on foot. Bohuslav drank himself to death one year after Jaroslav's death.