The charity Parentline Plus, which offers phone-based support to parents, has changed its name to Family Lives.
The charity said the rebrand to Family Lives, which is the charity's legal name, would reflect a gradual expansion of the organisation's role since it was established in 1999.
The rebrand was also prompted by its recent acquisition of the charity Bullying UK, which had financial difficulties.
A spokesman for the charity declined to reveal how much it spent on the rebrand, but said the expense of creating a new website and printing new publicity materials had been mitigated by a reorganisation of the charity.
There have been redundancies in the past year as a result of the restructure, but the charity refused to give any figures.
Family Lives has moved offices and made savings by taking all development in-house, including web design.
In a statement, Jeremy Todd, chief executive of Family Lives, said: "Over the many years Family Lives has been operating as Parentline Plus, we have seen the demand for our services grow and develop.
"We believe that under the banner of Family Lives we will be in a better position to evolve and develop relevant services to meet the growing and future needs of vulnerable families across the country."