Can someone please tell me how to say "We honor our fallen/dead" Go raibh maith agat. Bob

Onóraimid ár marbh tite.
I'm not 100% no that. It may be too literal or I may have missed something.

Maidhc_O_g, go raibh maith agat. Bob

hello , i'm just wondering if anyone here knows the alphabeth to old acient irish! my name is Ó Flathabháin but i want a tattoo of my surname in old acient irish but i cant find a translation of it . go raibh míle maith agat.

Do you mean in Ogham or in the Seanchló?

The Seanchló is the same as the latin alphabet, but with h as a dot over the preceeding consanant

If you download bunchló from http://www.fainne.org/gaelchlo/

then you will see what you want here:
Ó Fla÷a¢áin

For ogham, see here http://www.evertype.com/standards/og/ogmharc.html

BTW Marbh tite is wrong, too literal as Maidhc suspected.

Tugamid onóir d'ár mairbh

would be my choice.