April 2017               Members belong to 11 distinct Haplogroups: E-L177, G-L177, J-M172, R-BY3291, R-M269, R-M343, G-PF3252, R-P312, R-U106, R-Z12222, and R-U198

Report on results as of April 30, 2017 written, sent to project members on April 30, 2017.

October 2013          Members belong to 6 distinct Haplogroups:  G-L177, E-M35.1, R-M269, R-P25, R-U106, R-P312

                              Report on results as of October 22, 2013 written, sent to project members on October 23, 2013.

March 2012             Members test at 3 distinct Haplogroups:  G (later to be renamed G-L177), R-M269, and E-M35.1

Report on Haplogroup G (later to be renamed G-L177) in The Netherlands written and sent to project members.

January 26, 2012       Valkenburg Surname Y-DNA Project started.