Prince Philip certainly had plenty of family there even if not his sisters. The Mountbattans and Greeks were well represented:
-Princess Alice: his mom
-Dowager Duchess of MH: grandmother
-His Uncle George's widow Nada and her 2 kids
-Louis, his wife, 2 daughters and SIL Lord Brabourne
-Crown prince couple of Sweden- his Aunt and Uncle
-Irene of Hesse- his maternal grand aunt who was accompanied by her son Sigismund, his wife and 2 kids, as well as her widowed DIL Calixta
-Aspasia, widow of Philip's cousin Prince Alexander, accompanied by her daughter and son in law, king and queen of Yugoslavia
-Queen mother Helen of Romania, his cousin, and her son the king
-Queen Frederica, his cousin's wife, and her 3 kids
-cousin Duchess of Aosta,her husband and son
-cousin Princess Katherine and her husband Sir Brandram
-Prince George (his Uncle), his wife and 2 kids
-Princess Nicholas, widow of his Uncle, and 2 kids
-Princess Christopher, widow of his Uncle and son
-Queen Alex of Denmark (1st cousin once removed), 2 sons, 2 DIL, and 4 grandchildren
-Harald of Denmark, 1st cousin once removed, wife, 4 kids
-Prince Carl of Vastergotland (1st cousin once removed), his wife, his son Carl, DIL Elise and granddaughter Madeleine
-Dagmar, 1st cousin once r. and husband
-Princess Axel, wife of 1st cousin once r. and 2 sons
-Count Eric and Viggo Rosenberg and Viggo's wife
-Princess Rene of Bourbon-Parma and 2 kids
-Victoria Eugenie (cousin to both but closer to Philip) with Infante Juan and his wife
Family alone he had 75 invites
Friends included Lady Georgina Kennard and her first husband Harold. The Duchesses of Abercon and Westminster are her daughters. She was close to the queen through racing (she is Andrew's godmother and daughter is William's) but her and her sister Myra were childhood friends of Philip. Their Aunt Nada (mom Zia's sister) was married to Philip's Uncle George.
Michael Parker wasn't simply a shipmate. He was Philip's private secretary and broke the news of the king's death. Story has it, he smashed the flash bulbs of the paps, after a photo call at Philip's stag party, to ensure privacy.
http://www.gettyimages.ca/pictures/...son-of-prince-andrew-of-and-picture-id3424241
I would venture to think a few of his military friends in the photo (night before) may have also attended.