Tartans — Om6 tartans beginning with Om, each with the number of setts it groups. Back to O or the A–Z.Oman RAF, Sultanate of (1)Oman Sultanate of.. Regimental (1)Oman, Sultanate of / Oliver dress (1)Oman, Sultanate of.. (1)Omani Regiment 2nd Pipe Sqn. (1)Omega Delta Sigma, National Veterans (1)