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| Tartan Name | Clackson (Personal) | | | | Category | Name
| | | | Designer | Clackson, Dr Stephen Gregory | STA Ref | 5831 | | Date Recorded | Not Specified | STWR Ref | 2985 |
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| Tartan Name | Cladish | | | | Category | Fashion
| | | | Designer | Marton Mills | STA Ref | 6011 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Clan Cancer Support | | | | Category | Corporate
| Reference | 14188 | | Designer | The House of Edgar | | | | Date Recorded | 30/01/2024 | | |
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| Tartan Name | Clan Cupra Club | | | | Category | Corporate
| Reference | 13235 | | Designer | Kinloch Anderson Ltd | | | | Date Recorded | 20/07/2021 | | |
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| Tartan Name | Clan Films, The | | | | Category | Corporate
| Reference | 12867 | | Designer | Lemoine, Thomas | | | | Date Recorded | 07/07/2020 | | |
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| Tartan Name | Clan Hamilton Society | | | | Category | Clan/Family | Reference | 13703 | | Designer | Clan Hamilton Society | | | | Date Recorded | 29/11/2022 | | |
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| Tartan Name | Clan Harben Pty Ltd | | | | Category | Corporate
| Reference | 13917 | | Designer | Harris, Tony David & Bennett, Mark Peter | | | | Date Recorded | 06/06/2023 | | |
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| Tartan Name | Clan Inebriated | | | | Category | Corporate
| | | | Designer | Strawhun, Dennis | STA Ref | 7692 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Clan Irwin Association | | | | Category | Corporate
| Reference | 12895 | | Designer | Roeger, William (Clan Irwin Association) | | | | Date Recorded | 05/08/2020 | | |
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| Tartan Name | Clan Kirkpatrick Society | | | | Category | Clan/Family | Reference | 15143 | | Designer | Edington, Harold A, Jr | | | | Date Recorded | 09/12/2025 | | |
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| Tartan Name | Clan McKay Drummers | | | | Category | Corporate
| Reference | 13700 | | Designer | McKay, Drew | | | | Date Recorded | 22/11/2022 | | |
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| Tartan Name | Clan Tackle Ltd | | | | Category | Corporate
| Reference | 14809 | | Designer | ScotlandShop | | | | Date Recorded | 06/05/2025 | | |
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