Where does “haikun” come from?

haikun (Hungarian) comes from Hungarian haiku, from Japanese 俳句, from Middle Chinese 俳 — paralleled.

Ancestry of “haikun”, step by step

Step	Language	Word	Meaning
1	Hungarian	haiku	haiku a Japanese form of poetry consisting of seventeen syllables: five for the first line, seven for the second, and five for the third
2	Japanese	俳句	haiku, a poem that usually consists of 5-7-5...
3	Middle Chinese	俳	paralleled