I travelled last year with my son via qatar airways. I was allowed to carry 50kg which i asked directly to qatar airways and 7 kg for handcarry. For my son, its only 10 kg as he was only less than 2 yrs old.

My family usually travel at least twice a year but via emirates. They carry each 50kg + 7kg handcarry.  That is only going to Manila but Manila to Doha, its only 20kg + 7 kg handcarry.