WordNet sense 1 (position or state of being dominant or in control):

ascendent

WordNet sense 2 (someone from whom you are descended (but usually more remote than a grandparent)):

ancestor, antecedent, root

WordNet sense 3 (tending or directed upward):

ascensive

WordNet sense 4 (moving or going or growing upward):

ascending

WordNet sense 5 (most powerful or important or influential):

dominating

WordNet sense 6 (exercising influence or control):

dominant