Mr Henning, who was in his early 30s, died after a head-on collision involving two vehicles on the N60 in Breaffy.
Mr Henning, who lived in Killawalla, was a front-seat passenger in one of the cars. He moved to Mayo after relocating with his family from South Africa a number of years ago.
His family are well-known in the area, and his father, Allan, runs a jewellery business in the village from a property called ‘The Spinney’.
His death notice reads: “Formerly of South Africa and the UK. David will be sadly missed by his loving family, father Allan Henning, mother Genevieve Davis, brothers Brett & Justin, sisters Leigh, Mary & Vanessa, brothers-in-law, sisters-in-law, nephews, nieces, uncles, aunts, relatives, neighbours and friends.”
The funeral will take place this Saturday, January 1, at 10am in St Patrick's Church, Killawalla before David is laid to rest in Killawalla Cemetery.
In the condolences section, one person has written: “Our deepest sympathy to you all. You are remembered in our prayers.”
Another added: “To our neighbours, we are so sorry for your terrible loss, may David rest in peace. We will keep you all in our thoughts in this difficult time."
Another person has offered their “deepest condolences to Genevieve and to all of David’s family on his death. Be assured of my prayers for you all and for David’s soul. May he rest in peace".
“Sorry for ur loss...u was like a second family to us...we love u liked u loved us..we are so sad u got taken so soon David...we will always think of you...we will look after your dad for u...love u always,” another tribute reads.
Another states: “Words cannot convey my heart felt sorrow on hearing of your loss of David. A gentle soul. Allan, Mary and Family we are so so sorry for your loss. You are all in our thoughts and Prayers. To David's mother our deepest sympathy. May he rest in peace.”