Board Thread:Theories and Speculation/@comment-36360877-20180731054230/@comment-25607614-20180731065209

The answer is a long and drawn out "Suuuuuuuure?"

It is possible, but only because we have no idea as to the identity of his parents beyond that his dad was a Sarutobi. Indulgence aside though, none of your presented speculation really gives us a hint of supporting evidence.

Parentage: We actually don't know if he's an orphan because his parents are so irrelevant to the story. It's possible, but Kishimoto has a thing about dead parents. If they're dead, he'll talk about them for days. If they're alive, you'll barely see them. (Sakura.)

Admiration of Naruto: He began admiring Naruto because Naruto didn't take any of his crap during their first meeting, rather than indulging in his spoiled behavior. We have no evidence to support that it had to do with any familial bond.

Verbal Tic: Using a certain word or sound as a way to punctuate your sentences is a common thing to make a character stand out in manga, and it's really common in Naruto. Only ones with "Datteba-" seem to represent a relation to Naruto and drawing a comparison like this is really close to saying Sakura could be Uzumaki because she says "Shannaro/Cha".

High Chakra: The Uzumaki clan isn't actually well-known for high chakra levels. Their clan's thing is a strong life-force, which affords them long life and superior constitution. Konohamaru also only used Taju Kage Bunshin in the filler. While canonicity has become nebulous, his ability to use this could be debated.

There's one pretty crucial piece of evidence that points directly to the contrary though. Kushina was moved to Konoha for the direct purpose of becoming the Second Jinchuriki of the 9-Tails. Her being moved like this implies that there were no other Uzumaki in Leaf Village prior to that, or they could have been used as the Jinchuriki.

That gives a very small window between Kushina coming to the village and Uzushio's destruction for other Uzumaki to move into Konoha. And you'd think they would have made sure one of their clan didn't spend his formative years entirely alone.