It is the first of a series of developments following its acquisition by Russell Investments in late 2013, says the company.
The IN Partnership name reflects the "close and co-operative" approach the network takes to working with its advisers and appointed representatives. It encompasses over 500 investment, mortgage and protection advisers and is focused on supporting and enabling this community, it says.
As part of the rebranding, OLPG subsidiaries the Whitechurch Network and Innovate Mortgages will move to the IN Partnership identity.
Greg Stark, member of the IN Partnership board and managing director of the UK Private Client Services Group at Russell Investments, said: "IN Partnership is about helping real people reach the financial goals that matter most to them.
"At the heart of this is the provision of top quality advice, and our commitment is to deliver the training, technology and tools that will help advisers be ever more effective in their roles. We are working hard to finalise a distinct yet flexible proposition that will suit the needs of our existing members and attract new ones to IN Partnership."
{desktop}{/desktop}{mobile}{/mobile}
Kevin McDonagh, group chief executive of On-line Partnership Group and now CEO of IN Partnership, said: "This rebranding is just one of the steps we're taking to refocus and strengthen the network. Our advisers are already benefiting from increased compliance, education and investment resources as well as the stability Russell Investments has brought."
Seattle-based Russell Investments is a global asset manager and offers actively managed multi-asset portfolios and services that include advice, investments and implementation. It has has more than £174 billion in assets under management and works with over 2,500 institutional clients, independent distribution partners and individual investors globally.