Father of mercies is one of the descriptive names of God the Father. The Greek word oktirmos stands for pity or compassion, hence the alternative versions of this name of God. Our heavenly Father is full of compassion and mercy towards us.
Father of mercies in Greek:
Ho patēr tōn oiktirmōn
Strong’s Concordance numbers: 3962, 3628
Bible reference: 2 Cor. 1:3
Blessed be God, even the Father of our Lord Jesus Christ, the Father of mercies, and the God of all comfort. (2 Corinthians 1:3 KJV)
Two variations of this name of God are Father of compassion (NIV) and Father of sympathy (Amp).
A similar Old Testament Hebrew name of God is Compassionate God.