Okay, than lets concentrate of the villagename "Weiler".
The Aler-family was a big family. At this time people got childrens every year. If you look through churchbooks at the years 1825 - 1850 you should find some traces of people with the name Aler.
The problem is, there are a lot of villages in Germany with the name Weiler.
I searched at Familysearch for villages named Weiler, which have evangelic churchbooks and belonged to Wuerttemberg.