As nouns the difference between parentage and filiation
is that parentage is of or pertaining to one's parents, and in particular, the legitimacy of one's birth while filiation is (uncountable) the condition of being a child of a specified parent.
As nouns the difference between filiation and foliation
is that filiation is (uncountable) the condition of being a child of a specified parent while foliation is (lb) the process of forming into a leaf or leaves.
As nouns the difference between filiation and biliation
is that filiation is (uncountable) the condition of being a child of a specified parent while biliation is (physiology) the production and excretion of bile.