As far as your cousin Michael is concerned, I can find him flying with 1./JG76 and 4./JG54. Try these links:
http://math.fce.vutbr.cz/safarik/ACE...h.campaign.pdf
This one has five claims during the Battle of France, including two in one engagement on 06.06.40
http://math.fce.vutbr.cz/safarik/ACE...of.britain.pdf
There are two claims here while he was with 4./JG54, a Blenheim and a Spitfire.
http://math.fce.vutbr.cz/safarik/ACE...y-ww2-1940.pdf
This one lists all seven.
Hope this helps,
T-6