Innā lillāhi wa innā ilayhi rājiʿūn. Indeed, to Allāh we belong, and to Him we are returning.
On the 28th of Ramaḍān, 1439 (Wednesday 13th June 2018) Ishaaq, the grandfather of Shaykh Abu Abdillah Yunus, passed on to meet his Lord.
Allāh (subḥānahu wa taʿālā) declares,
Wherever you are, death will overtake you, even if you be in lofty towers.
Everyone shall taste death. And only on the Day of Resurrection shall you be paid your wages in full. And whoever is removed away from the Fire and admitted to Paradise, he indeed is successful. The life of this world is only the enjoyment of deception. 
Death is a certainty of life, indeed life itself is teleological; man shall die and be questioned. It is in this sense that Allāh informs humans by way of counsel and encouragement that it is only the believers who are successful, those who avoid the fire and secure admittance into paradise. When a believer dies it is a time of great tragedy and loss for the community, but those who submit to the will of Allāh pay heed to what has been revealed,
And certainly, We shall test you with something of fear, hunger, loss of wealth, lives and fruits, but give glad tidings to the patient; those who when afflicted with calamity, say: from Allāh do we come, and to Him we shall return.” 
Shaikh Haitham al-Haddad and the Islam21c team would like to extend their sincerest condolences to Shaykh Abu Abdillah Yunus (and his family) whose grandfather passed on to his Lord. The role and efforts of his grandfather is well-known and we have trust that it will be among his many good deeds and legacy that will stand for him after his death.
Muslim narrated in his Saheeh that the Prophet (sall Allāhu ‘alayhi wa sallam) said:
“When the son of Adam dies, all his good deeds come to an end except three: ongoing charity, knowledge from which others may benefit after he is gone, and a righteous son who will pray for him.” 
“There was no one among the Companions of the Messenger of Allāh (sall Allāhu ‘alayhi wa sallam) who had the means, but he set up a waqf.”
The family, the children and grandchildren of the deceased are known for charitable work and we think good of them and hence we have our trust that they are also part of the legacy that uncle Ishaaq left and will be on his scale on the day of resurrection.
We beseech Allāh (subḥānahu wa taʿālā) to expand his grave, shower His infinite mercy upon him, to forgive his sins and grant his family patience. We also ask Allāh (subḥānahu wa taʿālā) to make this difficult time an expiation of sins and the raising of rank in the sight of our Lord.
Notes: 4:78  3:185  2:155-156  Muslim