這子

/hauko/ → /hɔːko/ → /hoːko/

Originally a compound of 這う (hau, “to crawl”) +‎ 子 (ko, “child”).[1][2][3]

• (Irregular reading)
  • (Tokyo) ほ​ーこ [hóꜜòkò] (Atamadaka – [1])[2]
  • IPA^(key): [ho̞ːko̞]

• 這う子

這子 (hiragana ほうこ, rōmaji hōko, historical hiragana はふこ)

1. a crawling baby
2. a protective charm for babies, made as a doll in the form of a baby, and intended to take on any misfortune in the real baby's stead
3. (rare) alternate name for 犬蓬 (inu yomogi, literally “dog mugwort”): Artemisia keiskeana, a kind of mugwort or wormwood

(protective doll):

• 天児 (あまがつ) (amagatsu)
• 御伽這子 (おとぎぼうこ) (otogibōko)
• はいはい人 (にん)形 (ぎょう) (haihai ningyō)

Compound of 這う (hau, “to crawl”) +‎ 子 (ko, “child”).[1][2][3]

• (Irregular reading)
  • (Tokyo) は​うこ [háꜜùkò] (Atamadaka – [1])[2]
  • IPA^(key): [ha̠ɯ̟ᵝko̞]

• 這う子

這子 (hiragana はうこ, rōmaji hauko, historical hiragana はふこ)

1. a crawling baby
2. a protective charm for babies, made as a doll in the form of a baby, and intended to take on any misfortune in the real baby's stead
3. (rare) alternate name for 犬蓬 (inu yomogi, literally “dog mugwort”): Artemisia keiskeana, a kind of mugwort or wormwood

This reading appears to be less common for the doll and dog mugwort senses.