The name LOGSDON and variations occurs in the following counties of England: Bedfordshire, Derbyshire, Hertfordshire, Lincolshire, Lordon, and Middlesex. Many Logsdons in the USA are descended from William Logsdon and Honora O'Flynn who settled in Maryland. Males are encouraged to SELECT the Y-DNA 111 MARKER TEST OR the Y-700 test as they provide the best genetic matching information. In any case, please order at least the Y-DNA37 marker test as the 12 and 25 marker tests will not allow fail-safe identification of a family line. We are also encouraging family members to consider both the mtDNA testing and Family Finder testing as part of their portfolio of DNA. Both are more difficult to apply in a genealogical sense. Both of these additional tests can be taken by either men or women. If you have any questions please contact us for further details and possible suggestions. Keep in mind that Family Finder takes a good look at ALL of your ancestral lines. With Family Finder you are able to essentially "see" those portions of your DNA that have been contributed by both your male and female ancestral lines.