My setting is the early seventeenth century (1623 to be exact), a village at the eastern edge of the Holy Roman Empire of the German Nation, on the border of Transylvania, with possible influences of the Eastern Church, where communion is given even to infants. The boy's father is the local lord, but he has been estranged from the Church for the past few years after his wife's death, so there may be concerns for the wellbeing of the boy's soul.
How likely would it be for the boy to receive his First Communion at age 6? Age 7?
