梓橘
[zĭ jú]
Zi orange: This could derive from affectionate nicknames for people, often related to personality traits. Or simply combining a traditional wood plant's character (梓 tree has cultural significance and symbolic meaning in Chinese traditions) with fruits like an orange for unique identification. A poetic way expressing warmth yet having firm support or foundation inside. Also could purely come out from liking those sounds as words put together.