According to the harrietbeecherstowecenter.org she and Calvin only had 7 kids.
"Harriet Beecher Stowe and Calvin Stowe had seven children. Only three survived them."
I cannot find any info on these 3 that have been added;
https://www.geni.com/people/Lora-Mae-Stowe-Tinsley/6000000035347657...
Also, Harriet & Calvin's daughter Georgiana only had a son named Freeman. Somebody added another son, Georgie. I think Georgie was just a nickname for Georgiana.
From Private & also tagging Private User that im making these disconnects.