一位

Japanese Wikipedia has an article on:

一位

Wikipedia ^ja

From 一 (ichi, “one, first”) +‎ 位 (-i, “rank, place”).

• (Tokyo) いちい (Nakadaka – )^[1]
• IPA^(key):

一(いち)位(い) • (ichi-i) ^{←いちゐ (itiwi)?}

1. the first or foremost place, first rank
2. (mathematics) a digit in the ones, 'unidigit'
3. (historical) the first-in-rank in the Japanese medieval court

• 散(さん)一(いち)位(い) (san ichi-i)
• 従(じゅ)一(いち)位(い) (ju ichi-i)
• 正(しょう)一(いち)位(い) (shō ichi-i)

Japanese Wikipedia has an article on:

イチイ

Wikipedia ^ja

English Wikipedia has an article on:

Taxus cuspidata

Wikipedia

Based on the the first in rank in the Japanese medieval court sense, from the 笏 (shaku, “baton”) they hold made of yew.^[1][2]

• (Tokyo) いちい (Heiban – )^[1]
• IPA^(key):

一(いち)位(い) or 一位(イチイ) • (ichii) ^{←いちゐ (itiwi) or イチヰ (itiwi)?}

1. the Japanese yew, Taxus cuspidata

   Synonyms: 蘭 (araragi), おんこ (onko), 蘇芳の木 (suō no ki)

• As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts (where katakana is customary), as イチイ.
• Not to be confused with いちい樫 (ichiigashi, “Quercus gilva”), which is also shortened to ichii.

• イチイ科(か) (ichii-ka)

• 榧(カヤ) (kaya)
• 伽(キャ)羅(ラ)木(ボク) (kyaraboku)

Compound of 一 (hito, “one”) +‎ 位 (kurai, “degree, rank”). (Can this⁽⁺⁾ etymology be sourced?)

一(ひと)位(くらい) • (hitokurai) ^{←ひとくらゐ (fitokurawi)?}

1. the first in grade or rank (Can we verify⁽⁺⁾ this sense?)

   Synonym: 一回り (hitomawari)

Various nanori readings.

一位(いつい) • (Itsui) ^{←いつゐ (Itwi)?}

1. a female given name

一位(かずい) • (Kazui) ^{←かずゐ (Kazwi)?}

1. a male or female given name

一位(かずのり) • (Kazunori) 

1. a male given name

• Shinmura, Izuru, editor (1998), 広辞苑 [Kōjien] (in Japanese), Fifth edition, Tokyo: Iwanami Shoten, →ISBN