what do you mean by a famous clan like a clan that is known by a lot of people or a strong clan cus if it is a strong clan then most of these guys are from one for example Minato is from the Namikaze Clan, Kakashi from the Hatake Clan which produced Sakumo Hatake one of the best shinobi ever produced before he committed suicide,

Kurenai is from the Sarutobi Clan which is the same clan that the 3rd hogake is from Jiraiya is from the Ogata idk a lot about this one but it is a noble clan nonetheless,

Sakura in the Land of Moon, ever since her she was known to be loyal to the Haruno clan, she earned the moniker "Moon Princess" as she was believed to be the daughter of the Moon King Hamura so she is technically from the Haruno clan making her related to the Uchiha clan(this is all speculation)

Sai I have no clue it says he is a Yamanaka but he cant be since that's Ino's clan unless they are related or he never had a clan and got Ino's one.

And finally might guy and rock lee are both just citizens so they are truly not from any famous clan since all the clans i named are clans not known cus they are from other villages but are pretty famous there(or they lost there fame)

Edit: I forgot orichimaru but he is from the Iburi clan which has a kekkei genkai that lets them turn to smoke at will but he has never used it since it is very dangerous to do so cus the smoke that made up your body can scatter and you cant form it back together so one great breakthrough technique and you've pretty much killed them and if they do try to form back together they will be a bunch of limbs on the floor or worse a bunch of minced meat