Can a man hide his family from his friend group or a woman he dated?

There’s a guy who hints at knowing me from the past. He could be one of two men. An ex friend, or an ex date. Neither one of them had said anything about having a wife and kids, or about their job or owning a house. Apparently he’s a widower, now, a single dad for some time now.

Can a man be very private with a friend group, about his job and his family life?

Can a man hide his family from his friend group or a woman he dated?
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