Thanks again Rewcastle.
I found my Longstaff family,John,wife Mary Ann (Todd) and first children born Bishop Auckland on 1841 Census Newgate St but by 1850 they appear on the Census for New York.John was a painter and gilder.
In 1853 they arrived Melbourne Australia,went to the goldfields then known as Forest Creek.
Within a couple of years Mary Ann died and a daughter suicided by taking arsnic.Another daughter married (three times) whilst father and son moved to Maldon Victoria.
It appears some of the earlier generations were butchers.
Commencing with the 1767 marriage of George Langstaff to Margaret Parker a number of the family became inn keepers,coopers etc.
I am not yet aware of any family having moved to Sunderland.
St Andrews Auckland seems to have been where they were baptised or married.
Any help appreciated.