Some genealogists work hard to convince family members to take DNA tests to help them solve research problems and increase their ability to analyze their own DNA matches. Others, for one reason or another, do not. Have you at least reached out to other descendants of your grandparents, great-grandparents to see if they have done an autosomal DNA test?
If they have, the connection is close enough that they should show up on your list of matches. You will know they tested because they are on the match list (you just may have difficulty determining who they are). If another descendant of a set of grandparents or great-grandparents has tested and they don’t show up as a match, that’s something to investigate.
But if you do not reach out and ask, you will never know if they tested.
If your family knows you are involved in genealogical research and that you have done a DNA test and they took one and did not see you on their list of matches, they may have realized that something they believed to be true about their family was not. In that case, there is a chance that they don’t tell you that they’ve taken a test.
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