Mrs Cox's parents, Jean and Gordon Leadbeater, said: "It was wonderful to see millions of people of all ages and backgrounds come out a year ago for the Great Get Together".
Before her death, Cox set up a cross-party commission called the Jo Cox Commission on Loneliness to shine a spotlight on the problem.
The charity, set up by Labor MP Jo Cox just before her murder in summer 2016, called for action from national Government in appointing a United Kingdom -wide strategy for loneliness across all ages, as well as naming a lead Minister for the cause. Cox was an advocate for those affected by isolation and loneliness during her time serving the British Parliament.
It's no wonder that 58% of migrants and refugees in London described "loneliness and isolation as their biggest challenge" when May's government has worked to create a "hostile environment" towards them, which leaves many increasingly isolated from society and scared even to access basic services like healthcare.
"Jo would be over the moon", her husband, Brendan Cox, tweeted.
'Metal Gear Survive' to feature microtransactions, require constant internet connection
The beta runs through January 21 and features two maps, three missions, and live events, according to Konami. The save data will not be taken over to the full game.
Ahead of the reception, the Prime Minister paid tribute to Jo Cox, her family and to those working for the Foundation and Commission for highlighting the issue.
Psychology studies have suggested that loneliness can be a greater public health hazard than obesity or smoking. Crouch will lead a cross-government group which will "take responsibility for driving action on loneliness across all parts of government and keeping it firmly on the agenda".
Sports and Civil Society Minister Tracey Crouch has been tasked with setting out a new strategy for helping the millions of people believed to be suffering from loneliness in the UK.
"Loneliness is harmful to both our physical and mental health, as well as being a deeply painful experience", material from the Campaign to End Loneliness says.
The UK government has already begun work on community initiatives to reduce loneliness across all age groups, provide funding for activities, scale up existing work, and developing evidence to focus on the most effective projects.