Abdil (ar|عبد ال) is another English form for the Arabic word "Abd-Al", "Abd-El", "Abd-ul" which means Servant of.
Abdil is also similar to "Abdeel" ("Servant of God"), which is also cognate to the popular Arabic and Muslim name "Abdullah" (ar|عبد الله), which means the "Servant of Allah". There are other Muslim names forms like Abdil or Abdi (ar|عبدي which literally means "My Servant" in Arabic). The form of Obadiah's name used in the Septuagint is Obdios; in Latin it is Abdias. The Bishops' Bible has it as Abdi.