Here are all the other families that will have a main\supporting role in the next few chapters . What they will be wearing at the reunion will be in the next Chapter. Beware, there is a massive amount of pictures ahead of you. Good Luck.
(The guys won't have pictures, they all wear tuxes.)
Potter Family:
Harry Potter - 35 Years old
Ginny Potter nee Weasley - 34 Years old
James Sirius Potter - 12 years old [Gryffindor] (Sorry, best picture I could find)
Albus Severus Potter - 10 Years old [Slytherin]
Lily Mione Potter - 5 years old [Gryffindor]
Zabini Family
Blaise Zabini - 36 years old
Luna Zabini nee Lovegood - 34 years old
Bethany Gwen Zabini - 15 Years old [Ravenclaw] (Not actually Evanna Lynch (Luna Lovegood) Her name is Emily Kinney)
Benjamin Frances Zabini - 13 Years old [Ravenclaw]
Flint Family
Marcus Flint - 38 years old
Pansy Flint nee Parkinson - 35 Years old
Vanessa Mione Flint -15 Years old [Slytherin]
Ron Weasley is Dating Lavender Brown.