ok way too early for creditable results but it looks like lines

DEMING ,DENNEHY seem to be running very close at least four close matched between the two names and to a DENNEY
DENNEHY also seems to be close to DANAHY
DENNISON shows relationships to DENNEY
DENNING is related to DUNNING
Another DENNEHY matches DANIELS DRISKILS and DRISCOLLS

DOWNEN matches DOWNING
DENDINGER AND DENE who match well we seemed to have found the Viking among us.Probably from the line which dipped into Central Europe.He is an I hallopgroup
on the mtdna James C. DENNING matched DENDINGER i am upgrading to check things out more