Step 1: Understanding the Concept:
Political alliances through marriage were a key feature of the Gupta Empire's expansion strategy.
Step 2: Detailed Explanation:
1. Prabhavati Gupta was the daughter of the famous Gupta ruler Chandragupta II (Vikramaditya) and his queen Kuberanaga.
2. She was married to the Vakataka king Rudrasena II in the Deccan region.
3. After her husband's death, she ruled as a regent for her minor sons, showing that royal women could exercise significant power.
4. Her inscriptions, like the Poona copper plate, are historically important because they document land grants made by a woman, which was an exception to the general rule of {Dharmashastras}.
Step 3: Final Answer:
Prabhavati Gupta was the daughter of Chandragupta II.