Johnny Senior

Johnny Montrano, Sr. was a pre-War criminal who is mentioned in Fallout 4.

Background
Johnny Montrano, Sr. was a member of one of the Italian families in Boston before the Great War. He was also the father of Johnny Montrano, Jr., a member of Sal Barsconi's crew.

After Montrano Jr. failed to notify Eddie Winter's crew that the police were on their way during a job, Winter hired Robert Cooper to kill Montrano and dispose of the body. Winter's primary concern was to ensure that Montrano Sr. never found out about what happened to his son.

Appearances
Johnny Montrano, Sr. is mentioned only in Fallout 4.

Behind the scenes
Johnny Montrano, Sr. is most likely the Fallout universe's parallel to real life mobster Johnny Martorano who also had a son by the name of John Martorano, Jr. and was also a hitman for Boston's infamous Winter Hill Gang.