My SIL is prego!

Back story, me and my SO have always had our names picked out. Austin for a boy Lily for a girl. We told SIL when I was pregnant for the first time no matter what my baby girl will be named Lily or some form of that! They tried ONE MONTH and got pregnant. By all means she can name her baby what she pleases but I will name my girl Lily ! And I have a feeling her babies last name will be the same as mine cause her babies father is a mess 🙄 I hope the best for her tho, I just don’t want anybody thinking I’m being spiteful cause I’m not, now she’s saying she wants her baby to be named Lily or Lola. I feel like this might be petty but for people who have been ttc for longer maybe they will get what I mean? Our names have meaning and while you can’t claim a name does anybody have two of something in their families ?