What does Tariq mean?
From the root t-r-q (ط-ر-ق, 'to knock, to come by night'), meaning 'one who knocks or arrives at night, night-visitor'. By extension it denotes the bright night/morning star; Surah at-Tariq is named for it. Borne by the commander Tariq ibn Ziyad (Gibraltar = Jabal Tariq).
What does Zayd mean?
From the root z-y-d (ز-ي-د, 'to increase, to grow, to add'), meaning 'growth, increase, abundance'. Borne by Zayd ibn Harithah, a companion and the adopted son of the Prophet. Also spelled Zaid.