| Old letter |
| Dead letter |
| O. E. letter |
| Thorn of yore |
| Defunct letter |
| Letter in runes |
| Icelandic letter |
| Old Saxon letter |
| Anglo-Saxon letter |
| Old English letter |
| Crossed "d" letter |
| Mrs. Woodrow Wilson |
| ''Th'' in Old English |
| Anglo-Saxon fricative |
| Old English fricative |
| Th" in Anglo-Saxon days |
| Old letter with a "th" sound |
| Old English letter still used in Icelandic |
| Phonetic alphabet symbol for "th" as in "the |