When the founding Shelbyville parents got disappointed too much and died of old age, the town of Mudhole Heights became full of bland hicks and other nasty humans alike. As he grew older, Tommy Shelbyville became a lone, weed-smoking cowboy who rode his horse and married a maid named Sandy Wallace who also rode her horse. Both were childless.
His twin sister Teagan however, became a proto-feminist glamour icon, since she was supported by her husband Toby Wiggum and her eight children. But five of them didn't survive past puberty, even though the middle children, fraternal triplets named Robert Wiggum, Yvonne Hellman and Patricia 'Patty' Hardy (all born in May the 16th 1820) did.
As the youngest triplet, but the second to leave the house, - due to her tomboyishly flighty and boisterous nature - Patricia married fellow former part time robber Oswald Hardy in 1844. In 1855, they birthed fraternal twins in a derelict house, naming them Mitchell and Melvina. Their relationship with the twins was pretty bad, so they gave them away to Yvonne and Arsenal Hellman, who raised them as their own, with their then teenaged daughter Fea in tow. Many years later, they birthed Linda Hardy, who got fostered by Mrs and Ms Bloomsbury - with then young Bassom in tow.
Yvonne married her somewhat younger sweetheart, future long time Shelbyville resident and paper magnate Arsenal Hellman, the middle child of the Hellman brothers, in 1839. They birthed their only biological child Fea two years later, in 1841. Yvonne died in 1875, Arsenal in 1889.