I got it.
Find my requested string:
^([A-Z])\w+\s+([A-Z])\w+,
Replace with:
\n$0
Making sure match case is set.
This separates everything out so that it looks like this:
Bethys Grimlaw, a capable trapper. Has wild blue
eyes, straight blond hair, a plain face, and a lean
build. Described as sympathetic though dull.
Spouse: Senn. 1 child
Laval Heldsheath, a talented herder. Has large
blue eyes, wavy red hair, a smooth face, and a
stocky build. Described as adventurous though
stubborn. Spouse: Mirri. 2 children
Jakov Buckhorn, a talented trapper. Has close-set
brown eyes, dry brown hair, a sculpted face, and a
willowy build. Characterized as insecure and
critical. Spouse: Arveera.
Gothar Longborn, a competent farmer. Has
knowing blue eyes, brittle auburn hair, a
blemished face, and a sinewy build. Said to be
gentle though coy. Spouse: Shatha. 1 child
Eliminates the issue with lines with no children.
Do a find\replace of “\r\n” replacing with nothing, changing to extended search mode.
This made 2500 lines how I needed it out of a document that was originally 9,982 lines long.