Coco

I know a few people named Corinne (all French Canadian) and they all use Coco as a short form, especially in English, since anglos often can't pronounce Corinne correctly.

Could be a nickname for Colleen.

In general it's also used for boys because in the Philippines it sounds masculine but in other countries it is used for girls only.

Multiple sources define the given name Coco as (possibly?) gender-neutral. Many users in the comments below have named both their daughters and sons Coco, and have met members of both genders with this name.

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Sources: https://en.m.wikipedia.org/wiki/Coco_(given_name)
https://forebears.io/x/forenames/coco

The name Coco was given to 83 girls born in the US in 2015.