In Mockingjay, the third book in The Hunger Games series, there is a minor character named Tigris. She is the owner of a shop in which Katniss and her team of soldiers take refuge during the assault on the Capitol. In The Ballad of Songbirds and Snakes, the subsequently published prequel, there is a major character named Tigris. She is Corianolus Snow's cousin.
Are these two Tigrises actually the same person? In terms of chronology, Ballad takes place some 65 years prior to Mockingjay (10th Hunger Games and 75th Hunger Games respectively), and Tigris is 21 years old in Ballad. She would thus have to be something like 87 in Mockingjay. The Tigris described in Mockingjay is certainly not young, but I did not get the impression of someone approaching the age of 90. She is however described as having various surgical procedures to alter her looks, which may be concealing her true age.
Katniss does mention that she recognizes Tigris as a stylist from one of the earliest Hunger Games she remembers. Given that Katniss is only 17, this can't have been much more than 10 years previous. If Tigris is indeed Snow's cousin from Ballad she would have been in her late 70s as a stylist in the Hunger Games. While certainly not impossible, it would seem to be at least out of the ordinary.
On the other hand, it would be mightily coincidental if they are two different people. As far as I can tell, there are no other names that are reused in the series. Tigris is not exactly a common name that one would expect to appear multiple times. Additionally, in both books Tigris is shown to be someone with particular sartorial proficiency.
Is there any clear evidence in the books that Tigris in Ballad and Tigris in Mockingjay are one and the same person? If not, is there any significance to these two characters having the same name?