1) Scottish boy name 
Donnchadh is a Gaelic masculine given name. It is composed of the elements donn, meaning `brown`; and chadh, meaning `chief` or `noble`. The name is also written as Donnchad, Donncha, Donnacha, Donnchadha and Dúnchad. In English it is pronounced `Donn-ah` or `Donn-a-ha`. Modern versions include (in Ireland) Donagh, Donough, Donogh and (...