Kissing the hand of one’s paternal or maternal uncle by way of showing respect and honour

Kissing the hand of one’s father or mother, or paternal or
maternal uncle, or a shaykh – if it is done by way of showing respect – is
permissible and there is nothing wrong with it, so long as it does not lead
to any obvious mischief, in which case it is disallowed because of the
mischief. 

Al-Bahooti (may Allah have mercy on him) said in Kashshaaf
al-Qinaa‘ (2/157): 

It is permissible to kiss the hand or the head as a sign of
religious devotion, and to show respect and honour, so long as there is no
possibility of provoking desire. 

What appears to be the case is that it is not permissible if
it is for some worldly purpose, in which case it is not allowed. End quote. 

It says in al-Mawsoo‘ah al-Fiqhiyyah, 13/131: 

It is permissible to kiss the hand of a pious scholar or just
ruler, and to kiss the hands of one’s parents, teacher or anyone who is
deserving of respect and honour. It is also permissible to kiss the head and
forehead, and between the eyes. But all of that applies only if it is done
by way of showing respect and honour, or love when meeting and parting, as a
sign of religious devotion and a sign of respect, so long as there is no
possibility of provoking desire. 

Ibn al-Battaal said: Maalik disliked kissing of the hand, and
he rejected what was narrated concerning it. Al-Abhari said: Rather Maalik
disliked it if it was done by way of undeserved veneration and showing
humility towards an arrogant man, but if it is done by way of drawing closer
to Allah, because of a person’s religious commitment, knowledge or high
status, then that is permissible. End quote. 

Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) said: 

There is nothing wrong with kissing the hand to show respect
to one who is deserving of respect, such as one’s father, a shaykh, or a
teacher, unless there is fear of harmful consequences, namely if the one
whose hand you kiss will be filled with self admiration and think that he is
of high standing; in that case we would disallow it because of this negative
consequence. 

End quote from Liqa’ al-Baab al-Maftooh, 177/30 

Ibn Jibreen (may Allah have mercy on him) was asked: 

What is the ruling on kissing the hand? What is the ruling on
kissing the hand of a person who has status, such as a teacher and the like?
What is the ruling on kissing the hand of paternal and maternal uncles and
others who are older? 

He replied: 

We think that this is permissible if it is done by way of
showing respect to parents, scholars, people of virtue, and elders among
relatives and the like. Ibn al-A‘raabi wrote an essay on the rulings on
kissing the hand and so on; please refer to it. 

If this kissing of the hand is done for older relatives and
people of virtue, then it should be done by way of respect and not by way of
showing humility, and it should not be done by way of veneration. We have
seen some of our shaykhs objecting to that and not allowing it, and this
attitude on their part appears to come under the heading of humility, not by
way of deeming it haraam. And Allah knows best. End quote.

https://ar-ar.facebook.com/benjebreen/posts/503781059706971

Based on the above: 

There is nothing wrong with kissing the hand of your paternal
or maternal uncle, if that is done by way of showing respect and honour. 

For more information, please see the answer to questions no.
130154 and
147755.

And Allah knows best.