What does Tynan mean?
Anglicized from Irish O Teimhneain, from a diminutive of Old Irish 'teimhean' meaning 'dark, dusky, gloom'. (A minority source instead links it to O Tadhgain, 'poet', but the 'dark' derivation is the one usually given.)
What does Conall mean?
Popularly glossed as 'strong wolf', from Old Irish 'con' ('hound/wolf') plus a second element. This is DISPUTED: the rigorous etymology derives it from Proto-Celtic *kuno- ('hound') + *walos ('prince, chief'), giving 'strong hound' or 'mighty chief' rather than literally 'wolf'. Flagged as uncertain.