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| Tartan Name | McCaslin | | | | Category | Other | | | | Designer | Unknown | STA Ref | 5934 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | McCook/Cook | | | | Category | Clan/Family | | | | Designer | Cook, Richard | STA Ref | 3910 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | McGeachie (Personal) | | | | Category | Name
| | | | Designer | McGeachie, David James | STA Ref | 7291 | | Date Recorded | Not Specified | STWR Ref | 3240 |
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| Tartan Name | McGill (Personal) | | | | Category | Name
| | | | Designer | McGill, David | STA Ref | 3420 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | McGill University | | | | Category | Corporate
| Reference | 10755 | | Designer | Lochcarron of Scotland | | | | Date Recorded | 09/01/2013 | | |
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| Tartan Name | McHale, Barry | | | | Category | Name
| Reference | 10708 | | Designer | McHale, Barry | | | | Date Recorded | 27/09/2012 | | |
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| Tartan Name | McSilly Six | | | | Category | Other | Reference | 14894 | | Designer | Lochcarron of Scotland | | | | Date Recorded | 01/07/2025 | | |
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| Tartan Name | Mekos, The | | | | Category | Corporate
| Reference | 11072 | | Designer | Wood, Charlotte | | | | Date Recorded | 12/06/2014 | | |
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| Tartan Name | Mikeysline | | | | Category | Corporate
| Reference | 14119 | | Designer | Mackenzie, Siobhan | | | | Date Recorded | 14/11/2023 | | |
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| Tartan Name | Moggach (Strathspey) | | | | Category | Name
| Reference | 10875 | | Designer | Geoffrey (Tailor) Highland Crafts Ltd | | | | Date Recorded | 07/08/2013 | | |
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| Tartan Name | Muskoka | | | | Category | District
| | | | Designer | Wattson/Kirkvaag | STA Ref | 1799 | | Date Recorded | Not Specified | STWR Ref | 1799 |
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