| Code: | owl |
| Name: | Old Welsh |
| URL Form: | old-welsh |
| ISO 639-1: | |
| ISO 639-2: | |
| ISO 639-2-ALT: | |
| ISO 639-3: | owl |
| ISO 639-5: | |
| IETF BCP 47: | owl |
| Scope: | language |
| Dates: | 800-1100 |
| Extinct: | yes |
| Constructed: | no |
| Glossary Link: | |
| Wikipedia: | |
| Alt Names: | |
| Relevant Usage: | Old Welsh; |
| Parent: | Celtic |
| Children: | |
| Ancestor: | Brythonic |
| Descendants: | Welsh; |
| Description: |