Susan Wojcicki, whose sister Anne Wojcicki was married to Google co-founder Sergey Brin, was left devastated after her son was found dead in his dorm room in February.

“Susan was not just my best friend and partner in life, but a brilliant mind, a loving mother, and a dear friend to many.

“Her impact on our family and the world was immeasurable. We are heartbroken, but grateful for the time we had with her. Please keep our family in your thoughts as we navigate this difficult time.” Wojcicki was akin to Silicon Valley royalty as one of the first employees hired by Google founders Larry Page and Sergey Brin. Her sister, Anne Wojcicki, was the founder and CEO of 23andMe and married to Brin from 2007-2015.

It was Wojcicki who recommended that Google acquire YouTube, which was eventually purchased for $1.65 billion.

She became YouTube CEO in 2014, a position she held for nine years, and was named one of Time Magazine’s 100 most influential people in 2015.

In February, Wojcicki’s 19-year-old son, Marco Troper, was tragically found dead in his dorm room at the University of California, Berkeley.