Dearthair
leas-dheartháir
Irish: Deartháir beag
The Irish word for 'brother' is deartháir (pronounced dri-haw-ir).
You need to specify Irish Gaelic or Scottish Gaelic: they are two separate languages.
uasalathair
In Irish, "An ceann deireanach";In Scottish Gaelic: ?
cnedach
deartháir = brothermo dheartháir = my brotherA dheartháir = if you were calling out to him.
Go raibh maith agat, a dheartháir gan aird. (or a dheartháir gan mhaith).
Irish Gaelic? Scottish Gaelic? Manx? Which one? In Irish it's "an folcadán"
In Irish: Dia 's Muire dhuit. (to one person).