> I'd love to hear more about how a culture that doesn't name children under 5, do their child rearing and generally go about their life.

(Christian Orthodox, majority) Greeks don't name babies when born, only when baptized (usually during the first year, but could be later). Until then, they appear on formal documents as either "male"/"female" or as "AKO" ("no first name"). In practice, people either call a baby "the baby" or may sometimes use the (future) name informally.