Hmm. I used to have someone. Some names often used were common and simple. The usual darling, babe, baby, love, etc. A more creative and personal one was 'Flapjacks' (since they made great pancakes) and once I was called something I think is too cutesy so I don't wanna remember that or share it. Meh. I now call them an asshole, bastard, bozo, sod, boot licker, clown, dick, and an array of words that I probably shouldn't say when we do run into each other.
I don't have one but some of the common ones used by couples around me besides darling, baby etc are; Hamare Miya - my husband khawind - A more sophisticated urdu word for hubby Hamare unho / woh - hamare mean my (or our) unho /woh means that person. Literally that person of mine. Aji sunte ho- (AJI = Ae + Ji). Ae is like calling oi/ oye and ji is added to show respect. For example Papa ji or Mama Ji or Alex ji etc. The entire text here mean oi listen but coyly. Bittu ke papa - my sisters don't use this but it's common in India to call upon husband as (....)'s father. In this case bittu is the son's name Suniye ji- please listen dear Dulhan - this is cute. Dulhan means bride. Usually upto a month post marriage, the newlywed is treated as a bride and is forbidden from doing household chores and is often taken to greet relatives of both sides and people of both sides (friends and family) invite them over dinner. After that slowly they're introduces to house work and then they start taking up responsibilities. But what's funny is that some husbands keep calling their wife dulhan even after their grandchildren are about to be married, it's both cute and romantic. Imagine an old man calling an old women my bride after they've been married for more than 50 years. Begum - Royal term for married women of high rank in nawabs(used to be sovereign rulers in india) can also be meant as Mrs. Also was used for queens. So my queen kinda vibe Zoujah - equivalent of khawind but wife Jaan / jaanu / janam - my life Babu / Shona: cringey sugar loaded titles. I have seen couples play around with these titles often.