[3] He married Dr. Santha Joseph (died 2023), retired as Additional Director, Kerala Health Department, on 15 September 1971.

[4] Jomon Joseph, the youngest, suffered from Down's Syndrome, and died due to a massive heart attack in 2020 aged 34.

The second time was for leaving Left Democratic Front for united Kerala congress.

It was after 23 years, Joseph's party again merged with Kerala Congress (M) and an alliance member of United Democratic Front (UDF).

Kerala Congress (Joseph) issue raised in Muvattupuzha Lok Sabha seat made him leave the alliance and join LDF.

In 2010, after 23 years, Joseph's party again merged with Kerala Congress (M) and an alliance member of United Democratic Front (UDF).

[15] A power struggle erupted in the party between Jose K. Mani faction and P. J. Joseph fraction.

[16] Joseph resigned from the Kerala Cabinet on 4 September 2006 as he was accused of misbehaviour with a lady co-passenger on a Kingfisher flight.