Brother or sister 'consanguine' means a half brother or sister, i.e. from the same blood. A 'natural' child is a child born out of wedlock. Only son or daughter 'in life' means that all the other children of the family have died. There is nothing more thrilling than finding an original document with your forebear's name on it. Don't rely solely on printed sources, especially if no original sources are given.
Many authors are lazy and just copy from one another.
Quite often, they copy incorrectly. It should also be realised that there is a lot of unindexed material and so much is still hidden. Diane Baptie is a Scottish genealogical and historical researcher. Please contact her by email or visit her web page for additional information about her services. The contents of these webpages are copyright.