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Square Inc. Co-Founder Tristan O’Tierney Dies at 35

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Square Inc. co-founder Tristan O’Tierney died on Feb. 23, his mother, Pamela Tierney, said on Saturday. He was 35.

“I don’t have an official diagnosis,” she said by phone, adding that it was probably related to his addiction. A doctor called her to say Tristan had kidney failure and was under cardiac arrest, she said.