I can find no canonized Catholic saint by the name of Liam.
The only Saint Liam was a racehorse by that name who died in 2006. The owners made a huge donation to Notre Dame University in the name of the horse. The money was used for a medical center there and named in honor of the horse. So, if your name is Liam, you have been named for a horse.
Liam is Gaelic for William. So, technically, St. William (patron saint of York England) is St Liam
The only Saint Liam I can find is a race horse by that name so, no, Liam is not a good choice for a Confirmation name
90210 has a character named Liam.
There is no saint named Scarlett.There is no saint named Scarlett.
There is no canonized saint named Madison.
Thgere is no saint named Jenny but there is a saint named Genevieve.
There is no saint named Rae.
I can find no canonized Catholic saint by the name of Liam.
Liam doesn't have cousins?
There is no saint in the Catholic tradition named Saint Tatum. The name Tatum is not a commonly recognized saint's name.
There is a saint named Therese and several others named Teresa but I can find no saint named Theresa.