
The search engine has also reverted to its original name , which was dropped two years ago, along with the butler, in favour of a cleaner interface.
Ask Jeeves was launched in 1997 with the Jeeves figure able to answer specific questions typed in to the search engine.
In October last year, Ask.com relaunched for the second time in 18 months, enabling users to view answers to questions within the results page rather than having to click through to suggested page to find what they are looking for.
In the latest relaunch Ask also plans to integrate more content into its search, including recipes, blogs, images, music and videos.
Cesar Mascaraque, managing director of Ask Jeeves Europe, explained the u-turn by saying that Jeeves has been brought back due to demand from users.
"Very few brands have the strength of askjeeves, and according to YouGov surveys UK internet users wanted Jeeves back regardless of whether they were ask users or not," he said.
"Jeeves brings warmth and humanity to the search experience, and thanks to the enhancements we have made to our site, he is even better at providing answers than ever before. Users see Jeeves as approachable and trustworthy and helpful."
He said the company had focussed on improving the user experience through generating more relevant search results faster, and it is now time to focus on strengthening the site's branding to retain users.
The return of Jeeves will be promoted online and offline, with the butler posing a ‘question of the day' to followers on Twitter and Facebook, alongside video and diary posts.
According to Hitwise, in the last month ask accounted for just 1.67 per cent of search queries, and commanded 0.42 per cent of UK search engine visits.
Ask.com is now accessible via three additional URLs- ask.co.uk, askjeeves.com and askjeeves.co.uk.