Always indicate when a date, name, or a relationship is conjecture. Make it crystal clear to anyone reading the information later that the information was a hunch.
Be careful making hunches. Be careful sharing hunches. Have a reason for your hunch. Include that reason with your hunch. Cite your reason if you have a document.
Think one more time about the reasonableness of your hunch.
Once someone spreads them as fact it can be impossible to prevent the spread.