あんた, 貴方
Pronoun, See 貴方・あなた・1, Colloquialism, Usually in kana, familiar form of あなた; oft. considered rude
you
ねえあなたたち行かないで。
は
Particle, pronounced わ in modern Japanese
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis