Not all profiles are listed in the "Search engine results" tab, because of indexing restrictions. Use the search of the respective social media in "Search links by site" tab for a more thorough search when needed.
Facebook: https://www.facebook.com/search/people/?q=Elvis
Twitter: https://twitter.com/search?q=(from%3AElvis)&f=user
TikTok: https://www.tiktok.com/search/user?q=Elvis
Myspace: https://myspace.com/search/people?q=Elvis
Classmates: https://www.classmates.com/siteui/search/results?q=Elvis&searchType=people
VKontakte: https://vk.com/search?c[q]=Elvis&c[section]=people
Diigo: https://www.diigo.com/people/search/name?type=name&query=Elvis
Plurk: https://www.plurk.com/search?q=Elvis&kind=plurker
Govloop: https://www.govloop.com/members/?members_search=Elvis
Skyrock: https://en.skyrock.com/search/people/?q=Elvis
Flickr: https://www.flickr.com/search/people/?username=Elvis
YouTube: https://www.youtube.com/results?search_query=Elvis&sp=EgIQAg%253D%253D
Quora: https://www.quora.com/search?q=Elvis&type=profile
DeviantArt: https://www.deviantart.com/search/artists?q=Elvis
Goodreads: https://www.goodreads.com/search?q=Elvis&search[source]=goodreads&search_type=people&tab=people
Wattpad: https://www.wattpad.com/search/Elvis/people
Twitter: https://twitter.com/search?q=(from%3AElvis)&f=user
TikTok: https://www.tiktok.com/search/user?q=Elvis
Myspace: https://myspace.com/search/people?q=Elvis
Classmates: https://www.classmates.com/siteui/search/results?q=Elvis&searchType=people
VKontakte: https://vk.com/search?c[q]=Elvis&c[section]=people
Diigo: https://www.diigo.com/people/search/name?type=name&query=Elvis
Plurk: https://www.plurk.com/search?q=Elvis&kind=plurker
Govloop: https://www.govloop.com/members/?members_search=Elvis
Skyrock: https://en.skyrock.com/search/people/?q=Elvis
Flickr: https://www.flickr.com/search/people/?username=Elvis
YouTube: https://www.youtube.com/results?search_query=Elvis&sp=EgIQAg%253D%253D
Quora: https://www.quora.com/search?q=Elvis&type=profile
DeviantArt: https://www.deviantart.com/search/artists?q=Elvis
Goodreads: https://www.goodreads.com/search?q=Elvis&search[source]=goodreads&search_type=people&tab=people
Wattpad: https://www.wattpad.com/search/Elvis/people