Since there is almost no information on that profile - unnamed parents, one unnamed sister, and no locations for any of them - it is difficult to tell if these are the same people. There are dates, though, and the profile for Jarvis states born about 1800 and died 1870, which is almost two centuries before your Jarvis Churchill. Though the accuracy of the dates on Churchill-2230 may be in doubt because of the lack of data and sources, that person's niece, Mary Earle Brown was born in 1839 and died in 1917 in Bay Roberts, Newfoundland. I'm not familiar with Newfoundland, but that location may help you determine if this is the family you seek. If they are not the same person, perhaps it is the same family and your Jarvis was named in honor of this one?