I would like to redeem some E certificates and understand that each person needs to be booked on a separate PNR in order to use the E certs. I have no issues doing this with my Wife as she's been on a separate PNR many times when I've been travelling on business and she comes with me. However, would there be an issue with my 2 year old child travelling on a separate PNR with us (same flights and adjacent seats)?

We would essentially have 3 passengers (me, wife, and child) on 3 separate PNRs, so we could use 3 E certificates. Just want to make sure that there won't be any issues with the child on his own PNR.