| Carnedd Llewelyn | 
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|  | 
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| Elevation | 1,064 m (3,491 ft) | 
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| Prominence | 750 m (2,460 ft) | 
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| Parent peak | Snowdon | 
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| Isolation | 11.72 km (7.28 mi) | 
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| Listing | Marilyn, Hewitt, Welsh 3000s, council top, Nuttall, Furth | 
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| English translation | Llywelyn's/Llewelyn's cairn | 
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| Language of name | Welsh | 
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| Pronunciation | Welsh: [ˈkarnɛð ɬəˈwɛlɨn] | 
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| Location | Gwynedd / Conwy, Wales | 
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| Parent range | Snowdonia | 
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| OS grid | SH683644 | 
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| Topo map | OS Landranger 115, Explorer OL17 | 
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| Easiest route | Hike | 
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Listed summits of Carnedd Llewelyn
| Name | Grid ref | Height | Status | 
| Carnedd Dafydd | SH663630 | 1,044 m (3,425 ft) | 3, H, N | 
| Pen yr Ole Wen | SH655619 | 978 m (3,209 ft) | 3, H, N | 
| Foel Grach | SH688658 | 976 m (3,202 ft) | 3, H, N | 
| Yr Elen | SH673651 | 962 m (3,156 ft) | 3, H, N | 
| Foel-fras | SH696681 | 942 m (3,091 ft) | 3, H, N | 
| Carnedd Gwenllian | SH687669 | 926 m (3,038 ft) | 3, H, N | 
| Llwytmor | SH689692 | 849 m (2,785 ft) | H, N | 
| Pen yr Helgi Du | SH698630 | 833 m (2,733 ft) | H, N | 
| Bera Mawr | SH674682 | 794 m (2,605 ft) | H, N | 
| Drum | SH708695 | 770 m (2,530 ft) | H, N | 
| Drosgl | SH664679 | 758 m (2,487 ft) | H, N | 
Carnedd Llewelyn, also spelled Carnedd Llywelyn, is a mountain massif in the Carneddau range in Snowdonia, north-west Wales. It is the highest point of the Carneddau at 1,064 metres (3,491 ft) and the second-highest peak by relative height in Wales, 49th in the British Isles and lies on the border between Gwynedd and Conwy.