Einstein married Mileva Marić on January 6, 1903, and their relationship was, for the time, a personal and intellectual partnership. In a letter to her, Einstein wrote of Mileva as “a creature who is my equal and who is as strong and independent as I am.”[14] There has been debate about whether Marić influenced Einstein's work.[15][16][17] On May 14, 1904, Albert and Mileva's first son, Hans Albert Einstein, was born. Their second son, Eduard Einstein, was born on July 28, 1910.