David S Day 11 vs Marcus (LLL)

Pleasantly surprised—shocked more like it—with a 5/6, with guesses I thought were probably way off being right. 

1. Isosceles :), D20. This was a guess, but it seemed to fit the clue very well, so I’m not that surprised to get it. I suspect Marcus can work out the etymology. 
2. Peppin :), D31. Went back and forth between Clovis and Peppin (yes, spelled incorrectly) but ultimately chose right on the back of the (marginally) related musical of the (almost) same name. 
3. Chanel :), D12. Totally throw away answer. Never imagined it would be right. 
4. Rockwell :(, D22. Ha. I actually thought this guess had a decent shot. 
5. Tam Tam :), D11. Not much thought to this. Only repetitive instrument I could think of. 
6. Nickelodeon :), D03. This may be a gimme for some, but it certainly wasn’t for me. Hoping it isn’t for Marcus either! I’m too old to have watched SpongeBob myself, and my kids never did, either. But I knew enough to have heard of Bikini Bottom.