If you asked about historical heritages then no. Vietnamese and Cantonese are two totally different languages.
Canton used to be called 百越,Vietnam the word came from a phrase 百越之南,越南,it means south over 百越。Vietnamese have their own language system, they borrowed some Chinese characters to build their written language 喃字 (Chữ Nôm) in the past, after French invasion, Vietnamese adopted Latin alphabet and created a new written language Tiếng Việt. Their language has never been related to any dialect of Chinese.
Edit:
Duy Inoue Le Thu · 1 upvote from Eamon Dan
New writing name is not tieng viet lol it call quoc ngu and the writing was invented befor the french colony ( by jesus ) french just made it one of the official writing beside chu Nho and Nom it was vietminh who push for quoc ngu so we can teach people to read / write faster