Popular <a href="https://nameberry.com/blog/nicknames-ultimate-guide">nicknames</a> may be used on their own on the birth certificate or might be short forms for proper names ranging from the common to the unusual. 
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The nicknames here rank highly on both the US and the British lists of <a href="https://nameberry.com/popular_names">popular baby names</a>. These top nicknames are friendly and likeable, but may be much more widely-used than you guess given that they're used as diminutives for such a broad range of names. Don't be surprised if your little Ellie or Jack is one of many on the playground!
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The up side of these popular nicknames is that they make any name friendlier and more accessible. So you can choose a name of a mythological hero or a great-great-uncle and make it friendly in the contemporary world through one of these top nicknames.

Popular Nicknames

Abby

Addie

Allie

Andy

Annie

Bella

Belle

Betty

Billie

Billy

Bobbie

Bobby

Callie

Casey

Cass

Charley

Charlie

Cory

Dave

Eddie

Edie

Ella

Ellie

Elsie

Emmy

Evie

Ford

Frank

Fred

Hallie

Izzy

Jack

Jamie

Jenny

Jess

Jimmy

Jody

Johnny

Josie

Julie

Kate

Lena

Maddie

Maggie

Missy

Molly

Nate

Nell

Nick

Nicki

Nora

Ollie

Poppy

Romy

Rory

Rosie

Sadie

Sammi

Teddy

Tess

Thea

Theo

Will

Winnie

Zack

Black African American baby toddler boy sleeping

popular nicknames

Popular nicknames for girls and boys, including Addie, Callie, Teddy, and Frankie, with origins, meanings, and popularity (All Names)

Popular Nicknames - All Names