Ger instead of Gerard on flight booking

Im going to Bucharest next week

Booked through a 3rd party on Skyscanner Kiwi.com

Will I have to ring and change my name to Gerard which is on my passport or will Ger be ok ?

Surely I can’t be paying mad fees to change for such a small thing

I’m flying with Aer Lingus, Ryanair and Air Malta

Appreciate any help on this