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| Tartan Name | Cooper/Couper | | | | Category | Clan/Family | | | | Designer | Not Specified | STA Ref | 332 | | Date Recorded | Not Specified | STWR Ref | 332 |
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| Tartan Name | Coopers & Lybrand | | | | Category | Corporate
| | | | Designer | Nicholls, Deirdre | STA Ref | 2303 | | Date Recorded | Not Specified | STWR Ref | 2303 |
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| Tartan Name | Coorie | | | | Category | Fashion
| Reference | 14822 | | Designer | Lochcarron of Scotland | | | | Date Recorded | 13/05/2025 | | |
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| Tartan Name | Coorong Pelican | | | | Category | Fashion
| Reference | 14974 | | Designer | Giles, Alison Margaret | | | | Date Recorded | 26/08/2025 | | |
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| Tartan Name | COP (Culottés Ou Pas) | | | | Category | Corporate
| Reference | 13030 | | Designer | Minne, Benoit | | | | Date Recorded | 22/12/2020 | | |
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| Tartan Name | COP26 - A New Dawn | | | | Category | Corporate
| Reference | 13105 | | Designer | Wilton, Brian | | | | Date Recorded | 30/03/2021 | | |
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| Tartan Name | Copper Haze | | | | Category | Fashion
| Reference | 14056 | | Designer | Marton Mills | | | | Date Recorded | 26/09/2023 | | |
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| Tartan Name | Cordiner (Boddam) | | | | Category | Name
| Reference | 10721 | | Designer | Cordiner, Daniel | | | | Date Recorded | 22/10/2012 | | |
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| Tartan Name | Corey in Balachuirn | | | | Category | Name
| Reference | 10824 | | Designer | Corey, Martin | | | | Date Recorded | 02/05/2013 | | |
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| Tartan Name | Cork County, Crest Range | | | | Category | District
| | | | Designer | Viking Technology Limited | STA Ref | 7445 | | Date Recorded | Not Specified | STWR Ref | 3079 |
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| Tartan Name | Cork, County | | | | Category | District
| | | | Designer | House of Edgar - Macnaughton Holdings Ltd. | STA Ref | 2253 | | Date Recorded | Not Specified | STWR Ref | 2253 |
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