ān > ya > yád in other Indo-European Languages (1)
Turner’s A Comparative Dictionary of the Indo-Aryan Languages says Sanskrit word yád, meaning “that,” is a neuter form of the relative pronoun yá. He also lists the cognates of yá in other Indo-European languages and dialects:
Pali yō, yā, yaṁ, yassa, yēna, yamhi, yē; Prakrit jō, jā, jaṁ, jassa, jēna, jammi (jaṁsi), jē; Aśokan ye, e, Shāhbāzgaṛhī Rock Inscription of Aśoka and Girnār Rock Inscription of Aśoka yo; Language of ‘Kharoṣṭhī Inscriptions discovered by Sir Aurel. Stein in Chinese Turkestan’ ya, yena; Gāndhārī or Northwest Prakrit yo, ye; Woṭapūrī zē, zi; Kashmiri yih, yĕs; Pŏgulī dialect of Kashmiri yō; Kashṭawāṛī dialect of Kashmiri yi, yis; Ḍoḍī (Sirājī of Ḍoḍā), a dialect of Kashmiri in Jammu zō; Sindhi jo, jā, Lahndā jō, jis; Awāṇkārī dialect of Lahndā ji; Panjābī jo, jis; Bhaṭĕālī sub-dialect of Ḍogrī dialect of Panjābī jē; West Pahāṛī, Bhadrawāhī dialect of West Pahāṛī, and Bhalesī dialect of West Pahāṛī j̈ε῀; pāḍarī sub-dialect of Bhadrawāhī dialect of West Pahāṛī j̈ē; Paṅgwāḷī dialect of Shina, Curāhī dialect of West Pahāṛī jē; Curāhī dialect of West Pahāṛī jo, je; Nepāli jo, jas; Assamese zi, Bengali, Oṛiyā, Maithilī je, Old Awadhī jo; Hindī, Old Mārwāṛī, jo; Old Gujarātī ju, jiṇi, jaṁ; Marāṭhī j̈o; Koṅkaṇī jo; Sinhalese yam.