沙 ('sand') +
祖 ('ancestor') - 'Zazu' from
《狮子王》 (The Lion King), King Mufasa's red-billed hornbill majordomo. The character meanings are arbitrary; this is a pure phonetic match for Z-a-z-u. Other Lion King names in Chinese:
木法沙 Mufasa,
刀疤 Scar,
彭彭 Pumbaa,
丁满 Timon.