Among the Jewish people killed in Monday’s mass shooting at the Highland Park Fourth of July parade was Stephen Straus, 88.

Describing him as a family patriarch and a busybody, Straus’ relatives said he seemed destined to live much longer.

“He had an unquenchable thirst for life,” his niece, Cynthia Straus, said Tuesday in an interview.

A financial adviser well past most people’s retirement age, Straus still took the train into the city for work five days a week, but also made time for after-work excursions to the Chicago symphony and the Art Institute.

He painted as a hobby, too — that is, when he wasn’t exercising or on the phone with his brother, Laurence.

Cynthia Straus said he was in “remarkably good health” and said she would have expected him to live well into his 90s.

“He got up every day, got up and did things,” she said. “Like go to a parade!”

Straus and his young brother, Laurence, spoke on the phone several times a day, including on Monday, when Steve called to invite Laurence along to the parade. Cynthia Straus said she believed Steve ultimately went alone but was not sure.

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In addition to his brother, Straus is survived by his wife Linda, his children Jon and Peter, and four grandchildren.

Caryn Straus, Laurence’s wife, remembered her brother-in-law as “a very kind, a very wonderful, a very sweet, sweet man.”