Sources

Pronunciation guide

(Main) gender: Female
Pronunciation: kuu-ruu–mʸee [kɯ̟̀ᵝ.ɾɯ̟́ᵝ.mʲí]

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Etymology and/or ways to write:
This name is derived from the word (胡桃), referring to a walnut. There are multiple theories for its etymology, including a shift from 呉実 (kuremi), made up of 呉, an archaic word referring to China, and 実 meaning “seed; fruit,” the combination stemming from the walnut being introduced to Japan from China via Korea, and a shift from 黒実 (kuromi), the first element meaning “black,” from the dark, brown colour of the nut.
Other ways to write this name are shown in the table below:

ku (く)	ru (る)	mi (み)
胡桃 see above*		美/深 “beauty”
来/來/徠 “to come, arrive”**		実 “seed; fruit”
久 “long time”	瑠 part of 瑠璃 (ruri) “lapis lazuli”	未 sign of the Sheep; part of 未来 (mirai) “future”
玖 “black jewel; nine”	留 “stop”	見 “looking, viewing”
紅 “crimson”	琉 part of 琉璃 (ruri)	望 “desire, wish, hope”
公 “monarch, ruler”	流 “current, flow”	心 “heart, mind”
空 “sky”	月 “moon”	夢 “dream”

* 胡 on its own is also used
** also used as part of a split 1st element

Popularity:
Usage of this name is relatively recent, having been used since at least the 1940s. Increase in its popularity took place in the 1980s – around 0.095% of girls were given this name in 1990, when 胡 was added to the jinmeiyō kanji list.
From the 1990s to the 2000s, the general trend for its popularity was an upward one, having risen to over 0.39% by 2007, placing the name just below the top 50. By the 2010s, its popularity was already falling down. Based on a combination of Baby Calendar rankings data and my 2014-20 names research, Kurumi has been ranking below the top 100 for a while now, sometimes getting below 0.2%.

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