Devala

Devala cursed the gandharva Huhu, to become a crocodile.

He attacked king Indradyumna, who was cursed to be an elephant.

Dasha Mahavidya

Ten aspects of Shakti as Bagalamukhi, Bhairavi, Bhuvaneshvari, Chinnamasta, Dhumavati, Kali, Kamala, Matangi, Tara, Tripurasundari.

Read about Dasha Mahavidya here
https://vedicfeed.com/dasa-mahavidyas-the-10-aspects-of-adi-parashakti/

Durga Puja

See navaratri.

Dussehra

See navaratri.

Dusharaja

Fisherman and ferryman with whom Satyavati grew up.

Dharmavrata

Wife of Marichi.

Dashashvamedha Ghat

At this Ghat in Varanasi Brahma sacrificed (medha) ten (dasha) horses (ashva).

Damaghosha

Damaghosha (father) and Shrutshrava (mother) were the parents of Shishupala.

Dvivida and Mainda

Monkeys from Sugriva’s entourage, sons of the Ashvin. Dvivida was a minister of Sugriva and fought in the monkey army in the Ramayana. He became a demonic being and befriended with Naraka and Kamsa. When Krishna killed Naraka, he wanted to avenge him by attacking cities around Dwaraka. Balarama killed him on Raivataka mountain.

Dhrishtaketu

Son of Shishupala.