List the 3 individuals to whom Paul wrote a letter, that became a book of the Bible.

Paul wrote letters that became books of the Bible primarily to the following three individuals:

1. Timothy - Paul addressed two letters to Timothy (1 Timothy and 2 Timothy), providing him guidance and instruction on church leadership and personal conduct.

2. Titus - Paul wrote a letter to Titus (Titus), offering him advice on organizing the church and addressing issues within the community.

3. Philemon - Paul wrote a personal letter to Philemon (Philemon), appealing on behalf of Onesimus, a runaway slave, encouraging Philemon to accept him back as a brother in Christ.

These letters are part of the New Testament and serve both personal and doctrinal purposes, reflecting Paul's pastoral care and theological insights.