A poll of more than 3,000 parents has revealed the most popular nicknames children use for their grandparents. More than half of the families surveyed by Babycentre chose the traditional Grandma and Grandpa, followed by Nana and Papa. Grammy, Granny, Granddad, and Gramps came in third. More creative choices included Big Mama, Lala, Gangie and... er... Zippy for grandmothers and Bebop, Fafa, Bumpy and (our favourite) Yubba for grandfathers. Here's the full list in order of popularity:  Popular grandmother names Grandma Nana Grammy Granny Mimi Gram Nanny Oma Mamaw Gran Popular grandfather names Grandpa Papa Granddad Gramps Pop-Pop Poppy Papaw Pop Opa Pappy Do your kids have an unusual nickname for their grandparents? Let us know what it is on Twitter @HerFamilydotie.