Not knowing anything about my father, when I click on some 2nd, 3rd, 4th or further away cousins and hit shared matches, in some cases my close family (granddaughter, maternal half brother), maternal family first cousin do not show up.
The only conclusion I can come to is that either or connection is far back in history, or they are from his side.
Not having any information on him, the only hope I can see is that a close family relative of his or mine from him, (sibling, first cousin) shows up in a DNA match.
The closest so far is a 3rd cousin who is 192cms and 9 segments and shows no matches to my maternal matches, but matches a lot of other matches with less cms that don't either.
UPDATE, 1st or 2nd cousin 370cms, 21segments, shared with my granddaughter, me ibviously, but not my maternal half brother, or maternal 1st cousin. So where does this lead us? I am trying to make contact.