Property law

What happens to the property when husband dies and kids are still under 18.

Also when my father died we were all under 18 and my grandad and grandma put their names in the deed as guardians. Now they both have been passed away for a while but their names are still on the deeds. We are all in mid 30s early 40s and want to sell the property but not sure if death certificate will be enough to take their names off the deeds or weather my uncles and ants will get their share of the property?