It can be tempting to assume that a list of a couple’s children has them in order of their birth. That is not always necessarily true. Sometimes the children may be listed by gender or in the order in which the writer remembered their names. Children may not necessarily be listed in order of age in a will–they may be listed in an order based on the property they were bequeathed. They also may have nieces or nephews living with them. If you see an age gap, don't always assumed a second marriage. They may have had deaths of children. One of my ancestors had 13 children, but only 6 survived to adult age. Several died at birth.
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