Well, if it's Scots Gaelic, Na can be Than or What depending on the usage.
Mardh is March, but as in the month rather than marching.

The phrase altogether doesn't really make any sense to me. Gramatically speaking as well as the wording used it is pretty much just 4 words strung together.
(I will point out again, though, my Gaelic still has a long way to go.)