Have just logged into this site and seen a wealth of interesting stuff.
I am a descendant of the Yorkshire Agar 'clan' and I believe my sister Elizabeth (who is the geneologist of our family) has traced them back several centuries. We come from a group of villages to the east of York and I am sure she would be delighted to give you further information and correspond with you.
Her email is
Hope that's of some help
Prof. John Agar Director, Renal Unit Chief of Medicine Geelong Hospital Geelong, 3220, Victoria Australia