River shares the tranquil feeling of all the water names, and seems to have pretty much escaped its past strong association with River Phoenix and his unfortunate fate. Actor Joaquin Phoenix named his son with actress Rooney Mara after his brother River.

Crisp and colorful, Autumn is the most popular season name in the US — the only one in the Top 100 in recent years — though Summer and Winter don't rank too far behind. Cool and gentle at the same time, it also ranks highly in England and Wales.

There's definitely a cold front of names for winter babies moving in, with Summer, Spring and Autumn giving way to Winter--plus North, January, Frost--and Snow. This name feels brisk, fresh, pure, evocative -- and magical. A haunting middle name choice.

Fresher, brisker and, yes, cooler than Summer or Autumn or Spring, Winter is now a full-fledged female choice, especially since Nicole Richie and Joel Madden used it for daughter Harlow's middle name, and Gretchen Mol picked it as her daughter's first, as did media mogul Sean Parker. Winter continues to be the preferred spelling and has risen in popularity significantly over the past few years.

A mystical word name, most often reserved for black cats, Midnight conjures up darkness and the liminal space between the end of one day and the beginning of the next. It has seen some use as a baby name however, and was chosen by celebs Nicole Richie and Joel Madden for their son's middle name in 2009, and then by social media star, Jasmine Chiswell for her son's first name in 2022.

This body of water runs deep; the best of a group of new possibilities that includes Bay, Ocean, River, and the more established Brook. It has received attention via the actress Lake Bell. Lake would make a particularly cool and refreshing middle name, as Gisele Bundchen and Tom Brady did for daughter Vivian.

Birch is a rarely used nature name that calls to mind the lovely image of the tall, strong but graceful white-barked tree.