Céitinn, Cateing, Cating, Cayting, Ceating, Ceitin, Ceitinn, Kaiting, Kateing, Kating, Katting, Keatance, Keateing, Keatinge, Keatings, Keatting, Keeting, Keetinge, Keting, Ketinge, Ketting, Kettinge, Ketyng, Ketynge, Mac Céitín, MacKeating, McKeating
From the Irish Times webpage. I've blogged about this resource many years ago. It's good to revisit great resources periodically!
More possibilities abound: trade C for K, double vowels, omit second vowels, maybe trade a D for K and so on….