1900+ Four Letter Boy Names

Appealing name because, in German and Yiddish, it also means "dear" or "heart".

Despite two distinguished surname-bearers — the great British statesman William Pitt and heartthrob Brad, this would be a tough name to pull off in first place. William Thackeray used it for two generations of baronets in his novel Vanity Fair, the Sir Pitt Crawleys.

Militaristic.

Akif is derived from the Arabic word iʿtikāf, the practice of staying in the mosque for days, devoted to worship. It is commonly associated with the month of Ramadan.

If for whatever reason you're wed to the whole Zachary concept, this variation -- either as a proper name or a nickname -- is one way to make it new.