I sat down last night and like a detective, began reviewing the facts about the relationships known between Foulk Roberts, the Roberts family overall, and Jane Roberts. I recalled that the 1850 census taken in Waushara Township (later known as Fox Lake) Wisconsin had an interesting aspect to it. Not only were John and Jane (Roberts) Daniel and their two children represented on the return, but so too was an 8-year-old boy named Thomas Roberts.
I consulted the Carl Hankwitz public family tree on Ancestry.com. This is one of the most complete trees covering the Roberts family I could find. I looked for young lads named Thomas Roberts and found one immediately. In fact, the only lad who could qualify as the one enumerated with the Daniel family in the 1850 census was the son of Dafydd Roberts, brother of Foulk Roberts. His son Thomas was born in 1843, according to records associated with the tree, so here is yet another interesting connection between the families.
Now just because he was enumerated with the Daniel family does not mean Thomas was living with them. The way the U.S. census worked at the time, you could be visiting a family for the day and if the census taker stopped by, he included you in the return for the family living in that household. Still, the fact that he is listed on the Daniel return speaks to the kinship in the family.
In regards to "Despair's" look at Hugh Roberts, I found the following information, also taken from the Hankwitz tree. Hugh Roberts was recordedc as being among the family of Jane Roberts who settled in the Dodge County area of Wisconsin (along with Foulk). The Hugh Roberts being referred to here is recorded as Hugh "Huw" Roberts (1788-1865). There is a full biography on him attached to the Hankwitz tree. In fact, it is stated that upon arrival in Wisconsin, Hugh "met his old friend John Daniel." This would seem to confirm that the whole lot of them were quite well known to each other in back in Wales, prior to the mid-1840s.
Hugh was the brother of Robert R. Roberts (b.1777), from which Foulk descended. He also had brothers Thomas (b.1779) and David (b.1782), as well as sisters Jane (b.1785-d.1804)and Ann (b.1791).
I also checked the ship manifest from the journey John Daniel and family took across the Atlantic. Listed among the passengers specifically associated with Wales, were two with the last name Roberts.
One was recorded as Pugh Roberts, Tan-y-Buarth, Llandeiniolen. The other was John Roberts, age 46 (self and family, wife Jane, age 44, and children John, Robert, Humphrey, Ellen, Owen, Dorothy and Morris), Beddgelert. There was also a John Roberts who's age was listed as 30.
I'm not quite sure where to go with this, but reviewing the above stated details renews a bit of hope in me that a connection to my Jane Roberts can be established.