Hi Rheola

I'm not sure I can be much help as I haven't researched the Beach family to any extent, and my connection is not direct, but having said that I may have a sibling of your Jospeh in my tree.

I have a direct connection to the Howell family, Henry Howell b c 1777 married Susannah Jones. They had a daughter Mary b c 1807 who married James Beach b c 1816. James and Mary had children James b c 1839 and Silvea/Silvia b c 1840. Given that your Joseph's mother is also Silvia and she married James in 1815, I suspect that my James is a son of James and Silvia too, especially as James has a daughter named Silvia too.

Sorry not much help, but obviously a possible sibling for Joseph.

Regards

Simone x