Haapalah

Abraham אברהם or Avraham means "father of many" in Hebrew, or as a contraction of Abram or Avram and הָמוֹן (hamon) "many, multitude".
Abraham Avinu was originally named Abram, but God changed his name (Genesis 17:5). He led his followers from Ur into Canaan, and is regarded as being the founder of the Hebrews through his son Isaac,.
Abraham is regarded by Muslims as the founder of the Arabs through his son, Ishmael.
In Yiddush, Abraham or Avraham, is Avrum אברום.
The pet name for Avrum is Avrumel.

Mordechai מרדכי or Mordekhai, means Servant/Follower/Devotee of Marduk (arduka or Marduku)" in Persian and Aramaic.
Mordecai מרדכי is considered identical to the name Marduka or Marduku, the creator in Babylonian mythology, and so the term might have been understood by Jews to mean simply "[servant] of God".
Since Marduk was a war god,"[servant] of Marduk" may denote a warrior.
The name may have been derived from Aramaic mar dochi; mar being a title address for a gentleman and dochi, meaning "one who incurs merit".
In the Book of Esther, Mordecai was the cousin and foster father of Esther.
The pet names for Mordechai are Mordka or Mottel or Motti מוטי.