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Iceland's youngest players during the 1966 season, and their age in years and days on the occasion of their final appearance, starting or coming on as a substitute.
For each player age is measured in days, and in years and days, from their date of birth to the day of their first appearance.
| Player | Age (Y:d) | Age (days) | Match |
|---|---|---|---|
| Helgi Danielsson | -16:27 | -5817 | 09 Aug 1965v Republic of Ireland |
| Sigurvin Olafsson | -12:352 | -4031 | 05 Jul 1965v Denmark |
| Heimir Gudjonsson | -4:93 | -1368 | 05 Jul 1965v Denmark |
| Karl Hermannsson | 20:154 | 7459 | 09 Aug 1965v Republic of Ireland |
| Sigurthor Jakobsson | 22:323 | 8359 | 05 Jul 1965v Denmark |
| Thorolfur Beck | 25:165 | 9297 | 05 Jul 1965v Denmark |
| Ellert Schram | 25:268 | 9400 | 05 Jul 1965v Denmark |
| Jón Stefánsson | 28:82 | 10309 | 05 Jul 1965v Denmark |
| Arni Njalsson | 29:18 | 10611 | 05 Jul 1965v Denmark |
| Rikhardur Jonsson | 35:270 | 13054 | 09 Aug 1965v Republic of Ireland |