Just had a thought about R+L=J+M (Spoilers Everything)

Hi guys, sorry if this has been mentioned before but I was just explaining to my brother why some people believe that Jon and Meera are Luke/Leia esqe twins (I personally don't believe it), when i just realised that a hint to Meeras parentage may be her use of weapons and general badassness that is very similar to Lyanna.