Queen Louise of Denmark and the Cambridge family (George, Augusta and Mary, mother of the future Queen Mary) were first cousins. Apparently, Prince George, Duke of Cambridge, once harbored a tendre for his cousin Louise when the families met up at family gatherings at Rumpenheim--the forerunner of the infamous Danish royal gatherings. Queen Alexandra, being closer in age to Mary Cambridge than her mother was (11 years difference), was very close to her and this probably helped grease the wheels for a marriage between first Eddy, then George, and Princess May.