Very numerous: Ulster generally, N Connacht, N Leinster. Ir. Mac Maoláin, a dimin. of maol, bald or tonsured. The name is indigenous but also a variant of the Scottish Mac Millan to which must be attributed many of those in the North East.
rare: scattered. Variants of Mullan, q.v.
Very numerous: Ulster generally etc. Ir. Ó Maoláin, dimin. of maol, bald, blunt. The most important sept was in Derry. See also Mullen and Mullin(s).
numerous: W Limerick-Cork etc. Ir. Ó Maoláin. A locally-based name synonymous with Mullan, Mullen, Mullins, q.v.
Very numerous: all areas, remarkably even distribution. Mullen is predominent in the North, Mullins in the South. Ir. Ó Maoláin. Septs existed in Galway and Derry. It must be noted that an English name Mullins also exists and is surely present.
Quite numerous: Cork etc. Ir. Ó Maoláin (see O'Mullan). This name is common through the country in various forms. See Mullane, Mullen, Mullins, Moylan. IF & SGG.
Mullane, Mullen: an-líonmhar: gach aird. Aithnítear clanna i nDoire, Gailimh agus Corcaigh. Tá an leagan Mullane i Luimneach thiar agus Corcaigh. Maolánach dob'ea máthair Dhónaill Uí Chonaill. SGG & IF.