Complex sentence: Losh married Cecelia or Cecilia Baldwin, daughter of Roger Baldwin F.R.S., rector of Aldingham, then in Lancashire; they had a family of five sons and three daughters, with one child, the first-born, who died shortly.
Split into simpler sentences: Losh married Cecelia or Cecilia Baldwin, daughter of Roger Baldwin F.R.S., rector of Aldingham, then in Lancashire. They had a family of five sons and three daughters, with one child, the first-born, who died shortly.