ox with yellow hair and a black head
犉 refers to a specific type of ox with yellow hair and a black head. The meaning is narrow and descriptive, with no broader conceptual center.
犉 combines 牜 (cow) with 享, which likely provides the sound. The character is a specific term for a yellow-haired, black-headed ox.
The cow component 牜 on the left shows it's an ox, and the right side 享 looks like a head with a topknot, hinting at the distinctive black head on a yellow body.
For ジュン, imagine a yellow ox named June with a black head: June -> ジュン, and the ox is named after the month it was born.
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