Is it possible to send someone else to do Hajj on behalf of the deceased instead of his son?

No File Exists
Check below answers in case you are looking for other related questions:
A boy died and had not done Hajj; can Hajj be done on his behalf?
Is emission of semen the only sign of puberty?

No File Exists
Related Answers:
Conditions of Hajj being obligatory
It is not stipulated that fasts be observed consecutively for one who cannot find a hadiy
Taking money in return for doing Hajj on behalf of another
A boy died and had not done Hajj; can Hajj be done on his behalf?
Is emission of semen the only sign of puberty?

Recommended answers for you:
Being Successful in Life
When should a person make the intention to fast, and what if he finds out during the day that Ramadan has begun?
Shaving the hairs on the testicles and around the anus
Ruling on organ donation
Our attitude towards Yazeed ibn Mu’aawiyah