The Collaborative International Dictionary
Coguardian
Coguardian \Co*guard"i*an\, n. A joint guardian.
Wiktionary
coguardian
n. A joint guardian.
Usage examples of "coguardian".
Natha Lorins, daughter, coguardian to the young Keeper of the Records, took her hoe and Arona's and turned back towards the cluster of cabins around the trailhead.