Hello Scott!
You´re right about Greta Nilsdotter, her birthdate in the parishrecord are 12th of Jan, not Jun(e) 1736.
C:2 Gammalkil p 328 1736-01-12 (bapt) Greta
Baptised on the 12th of January the rider in cavalry (ryttaren)Nils Siömans (Sjömans) and wife Dårdi Gabrielsdotter at Risberget (Dårdi/Dordi are short for Dorothea).
Greta married twice, the first time married to the soldier Jonas Sandgren. GID 289.23.81600 C:2 p 199 Gammalkil. He was a soldier at Skista (Skiestad) in Gammalkil and she came from Unnerstad, G-kil. They married in 1759-10-14.
Second marriage to soldier Jonas Silfverstrand in 1766-08-03 (GID 289.24.15900) G-kil C:3 p 302. Silfverstrand came from Måshult on Skränge properties, G-kil and she from Åbacken, Kapperstad properties, G-kil.
Greta Nilsdotter dies at Åmberg/Omberg, Kapperstad properties 1779-09-01 GID 289.24.34300, C:3 p 663 - Greta is short for Margareta...
The birth you have found for Jonas Silfverstrand cannot be the right one. This is why:
Look at GID 289.2.63900 AI:2 Gammalkil p 341 Löth, here you have the Jonas Andersson who were born on the 25 th of July 1721...A farmer who dies in 1795 at Löt/Löth.
Later on in the parishrecords Jonas Silfverstrand is said to be born on the 21th of July 1721...It might be in another parish? Nykil?
Jonas Silfverstrand must have been a ladies man? As I see it he married four times. One marriage in 1755-05-04 Gammalkil (GID 289.23.81500), here it says he was divorced from his wife Brita Månsdotter and now married to Kerstin Andersdotter i Krångestad.
Then he marries Greta Nilsdotter in 1766 as above. When Greta dies he marries again in 1781-01-21 (GID 289.24.16300) to Maria Persdotter from Nysätter, Skränge properties (born 1758). Jonas Silfverstrand is now called churchwarden instead of soldier.
You can find Åmberg in AI:2 p 160 GID 289.2.54400 (1779-84) and AI:2 p 386 GID 289.2.66200 (1785-88). I can´t find Silfverstrand in the next parishbook AI:4.
Best regards
Britt-Marie