For anybody else with the same question…

The Ladybird browser started as a part of the SerenityOS Project. SerenityOS had adopted Ladybug imagery before the browser was conceived. “Ladybird” seemed like a perfectly reasonable name for a core component of the OS given its existing iconography.

It was ( and is ) as good name in context.

Ladybird has decided to split with its SerenityOS roots. I have pretty mixed feelings on that. Regardless, it would be silly to change the name at this point.

The same history applies to C++. SerenityOS is written in C++. Until the split, the OS and browser were maintained in a mono repo with extremely deep code integration and coordination. They share the same custom C++ standard library and coding conventions for example.

SerenityOS was started as a very personal project and the original author is ( or was ) a fan of C++. While I am personally not a fan, it seems like a perfectly reasonable language choice to write an OS in.