I am an Engledow researcher.I have not been able to make direct contact to one of these Haigh descendants.
The conncetion is as follows:
Randolph Engledow and Alley Nuckols had daughter, Mary "Polly" Engledow, 1818, Virginia.The Engledow family settled in Montgomery and Wythe County, Virginia.Randloph and Alley left Virginia and migrated to Missouri.Randolph died there in 1838.Daughter, Mary Engledow, married, 7 MAR 1839, in Washington County, Missouri, to John B. Haigh, b. 1814, England.I don't know John's parentage.It is said that he came to America at age 4 with his parents.
John B. Haigh and Mary Engledow had children:
Frances A.-1840, Missouri Sophia-1842, Missouri George Washington-1844, Missouri, married Julia B. (Had children:George W. Jr., b. 1870, G.A., W.R., J.A., and Freddie)***This where I thought George Bert and Fred Haigh Might tie in to this family. Robert-1847, Missouri, married Elizabeth Rogers.(Had children: Estella, 1874, Charles, 1876, Ethel, 1883) Alice-1852, Missouri Franklin "Frank"-1855, California Edwin-1857, California, married, 1885, to Emma Fried.(Had Child:Edna L., 1895)I've had contact with a Fried reseacher from this line.1885 wedding invitation at the Healdsburg Museum.
This Haigh family settled in Washington Township,Sonoma County, California, between 1852 and 1855. By 1870 the Haigh family had settled in Menicino, Sonoma County, California.They appear to have lived in Healdsburg. Another researcher found that there was some great information on the Haigh family in the Healdsburg Museum.I haven't had a chance to check with the museum, yet.
Since you mentioned Healdsburg, I think that Bert and Fred Haigh probably connect to this family is some way.