Zak, who was over three decades old at the time of his father's passing, currently works as a mental health advocate and as CEO of PYM, a company (named partly after Zak's middle name) which produces amino acid "mood chews". He was joined in his tribute by dozens of Twitter users, who honor Williams's legacy on this day every year.

Zelda Williams, Zak's half-sister, wrote her own tribute to their father on July 22nd, the day after the anniversary of the comedian's birthday. He would have turned 70 this year, had he not died by suicide after a long struggle with Lewy body disease.

Zelda Williams subsequently announced she would be taking a break from Twitter, citing how it became "predictably weird this time of year." Zelda, an actress in her own right (most notably Teen Wolf and Avatar: the Last Airbender sequel show Legend of Korra), was named after The Legend of Zelda video game series, of which she and her father were zestful fans.

In addition to his vast fanbase and loving children, Robin Williams is survived through his iconic acting roles, including John Keating in Dead Poets Society , the Genie in Aladdin, and the titular role in Mrs. Doubtfire.