Appropriate Tartan use,clanshipquestion.

[Pegasys]

The tartan you choose " I think ' is more to be determined by your clan . You seem to understand the septs concept well enough , IMHO the final tartan choice would be made by whatever clan had the most a : historical claim to my sept , then b: anecdotal claim to the sept . There are several modern authorities that 'determine' what plaid is assigned to what surname , and one major older authority namely R. R. McIan who penned the famous The Clans of the Scottish Highlands -Costumes of - 1845 . This URL is a much prized link I found to an ultra high definition digital scan of this rare but classic book : https://searchworks.stanford.edu/view/927302 . I offer this resource not to confuse but to show that for example , for my clan Fergusson the idealized romanticized depiction is the saffron Lein-croich , but it seems most Fergussons of a certain more classic 'vintage' age choose the weathered Fergusson tartan whereas those of the next generation like myself choose the Modern tartan . There are 2 other patterns also , Fergusson of Atholl and Fergusson of Balquhidder . So your surname of MacManus seems to be closer to Maguire than Gunn , but you would know better than I who your sept's house more properly is claimed by .

[TheMcManus]

The tartan you choose " I think ' is more to be determined by your clan . You seem to understand the septs concept well enough , IMHO the final tartan choice would be made by whatever clan had the most a : historical claim to my sept , then b: anecdotal claim to the sept . There are several modern authorities that 'determine' what plaid is assigned to what surname , and one major older authority namely R. R. McIan who penned the famous The Clans of the Scottish Highlands -Costumes of - 1845 . This URL is a much prized link I found to an ultra high definition digital scan of this rare but classic book : https://searchworks.stanford.edu/view/927302 . I offer this resource not to confuse but to show that for example , for my clan Fergusson the idealized romanticized depiction is the saffron Lein-croich , but it seems most Fergussons of a certain more classic 'vintage' age choose the weathered Fergusson tartan whereas those of the next generation like myself choose the Modern tartan . There are 2 other patterns also , Fergusson of Atholl and Fergusson of Balquhidder . So your surname of MacManus seems to be closer to Maguire than Gunn , but you would know better than I who your sept's house more properly is claimed by .

In Ireland , County Roscommon , they were associated with ruling Maguire family. McManus would be more a less a Clan of it's own right and part of the Connachta tribes not sept of the Maguires. That Tribal structure is interesting but has no bearing on any highland connection unless some people from different families went of to do Viking types of things together and ended up in the Norse-Gael pipe line that seems to have contributed to the Gunn clann. I think.
As far as the Clann Gunn seems tot be concerned:
http://www.clangunn.us/septs.htm
MacMains
MacManus
Magnus
Magnusson
Main
Mains
Mann
Manson
Maness
Manus
Every variation of the Magnus/son of Magnus (MacManus) surname is listed as a sept.
As oposed to the Colquhon's who only claim the standard and one variant of the name :
MacManus lived among and serve the Colquhoun families
MacMains variation of McManus
Based on this I am thinking that MacManus Gunn Connection is a pretty substantial one.
The Gunn Clann society has a genealogical database so I'm guessing they may have some answers.