| Answer | Crossword Clue |
|---|---|
| ENOS | First son of the third son |
| SETH | Third son of the first man |
| SETH | Third son in the Bible |
| LAMONT | The son on "Sanford and Son" |
| SWAM | Participated in the first third of a triathlon |
| ETA | Penultimate letter in the first third of the Greek alphabet |
| RHO | First letter in the last third of the Greek alphabet |
| NEAP | Occurrence after the first and third quarters of the moon |
| HARDC | Either of the first two consonants in "coccyx," but not the third |
