Bedfordshire & huntingdonshire
My Favell family can be traced directly back to Huntingdonshire in the 1760s and I suspect that they straddled the border into Bedfordshire and have links to the Favells in that County. Some stayed in the area, while others moved to London and Bradford in the late 19th century.
There is a distinct family that originate around the Lincoln and Boston areas that may have connections if they could be traced back far enough
There is a 19th Century Favell family with connections to Sheffield and I believe further North towards Sunderland and Durham. After the First World War a part of this family relocated to Cornwall.
There were Favells in London from the 18th century, with many being associated with the Surrey side of the River. Whether these were early London arrivals from the areas previously mentioned has yet to be established.