Jigna is a feminine given name of Indian (Gujarati/Marathi) origin, derived from Sanskrit jaganā ("to awaken" or "to be born"). It is not a surname.
Women named Jigna often bear the surname Patel after marriage (or maiden), as Patel is the most common surname among Patidars (Kanbi/Kunbi)—the dominant agrarian community of Gujarat. The name Patel means "village headman" (from Sanskrit paṭṭakila).
Thus, "Jigna Patel" is a frequent name combination, but Jigna itself is a first name. Other common surnames with Jigna: Shah, Desai, Mehta, Modi, Amin—reflecting Gujarati merchant/professional communities.