Where does “dédanyák” come from?

dédanyák (Hungarian) comes from Hungarian dédanya, from Hungarian déd-, from Proto-Slavic dědъ, from Proto-Balto-Slavic dēˀd-, from Proto-Indo-European dʰeh₁dʰ-, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.

Ancestry of “dédanyák”, step by step

Step	Language	Word	Meaning
1	Hungarian	dédanya	great-grandmother
2	Hungarian	déd-	great-grand
3	Proto-Slavic	dědъ	grandfather
4	Proto-Balto-Slavic	dēˀd-	—
5	Proto-Indo-European	dʰeh₁dʰ-	—
6	Proto-Indo-European	dʰeh₁(y)-	to suckle, nurse

Every word from Proto-Indo-European dʰeh₁(y)- →Every word from Proto-Indo-European dʰeh₁dʰ- →Every word from Proto-Balto-Slavic dēˀd- →