Hi Julia,

The link to the file you sent which offers a wealth of information of what are the first 148 pages of what looks like an enourmously comprehensive overview. Too bad, I didnot find the data I am looking for.  My interest goes out to the descendants of 
Meyer LEVIN who arrived in London early 1800's and was married to Esther Nathan.
Thanks for your help,
regards,
Ron Peeters