Any normal baby might have a family tree that traces back to their great-grandparents (great-great-grandparents if there's a historian in the lineage)...but 2-month-old baby Archie Harrison Mountbatten-Windsor is no normal baby.
Archie was born into house Windsor of the British imperial monarchy, and therefore fits into a massive web of noble ancestors. And it's clear Master Archie, who was just christened last week, must be one of the queen's faves, since he's already been added to the family tree that's on display at Queen Elizabeth's Scottish home castle where she spends most every summer, known as Balmoral. Queen Elizabeth reportedly arrived there last week and will remain in the Scottish countryside until October.
