Hans Albert Einstein had a close personal connection to what Serbian physicist born in 1875?
Hans Albert Einstein: Hans Albert Einstein ( ; May 14, 1904 – July 26, 1973) was a Swiss-American engineer and educator, the second child and first son of Albert Einstein and Mileva Marić. Mileva Marić: Mileva Marić (Serbian Cyrillic: Милева Марић; December 19, 1875 – August 4, 1948), sometimes called Mileva Marić-Einstein or Mileva Marić-Ajnštajn, was a Serbian physicist.
Mileva Marić