John Calvert's Death was abt 1617 or 1618 in Lurgan, County Armagh, Ireland. I don't know the exact number of children John and his wife Grace had, but I do know their last child was a son named Thomas Calvert Born 11 April 1617. John either died right before or after the birth of his last child Thomas.
John Calvert did Marry Grace abt 1605, and not anywhere near 1617.
Whoever anonymous is, needs to remove this false information from John Calvert's page.