When Olaus Enrici Chytraeus was born about 1636, in Giresta, Uppsala, Sweden, his father, Ericus Olai Krum, was 34 and his mother, Karin Johansson, was 22. He had at least 4 sons and 6 daughters with Maria Stiernman. He died in 1707, in Torstuna, Västmanland, Sweden, at the age of 71.