Goats i have a tonne of first cousins some of whom have the same name. My son has the same name as my dad (who died when I was a kid) and my brother (so for his Irish cousins he's got the same name as their dad or uncle). It caused a lot of confusion for them initially (they were all 7 or under) but is fine now (plus it was the only name I wanted for a son). I have several first cousins called names like Michael and John. They just got called things like Michael from X or Uncle Andy's Michael. So using the same name as your nieces/nephews' cousin may mean that your child ends up as 'baby X' initially and then 'Goat's X' or 'X no 2' or whatever. But if you're fine with that then use it, go with a name you both love and everyone else gets on with it (just don't share it with anyone - seems to me that leads to weird politics and hurtful opinions!).
It's interesting to hear about parents & inlaws buying stuff. That was never an option for us and I'm glad as we avoid some of the politics I hear about.
My mum supplies cute outfits, but she's a pensioner (78) and this will be grandchild no 15 - if she had bought big ticket items for all of them she'd be bankrupt! We'll fly her over after the baby comes - she's great though as she's like 'ah you won't want me there when the baby's only 2 weeks, (even though I think I do!) how about 4 weeks or older?'.
The inlaws are very helpful - they will mind my two older kids when I'm in labour and will also cook/clean/help out with distracting the kids as much as they can. But I doubt they'll even buy a vest! But they'll do things over the years like show them how to pick fruit and make jam or bake cookies or teach them how to paddle a canoe or read thousands of books (usually the same ones over and over!) so I know this baby will have just as good a relationship with them as my older two have.
My SIL on the other hand does my head in. When her nearly two year old was born, she had an amazon wish list and asked folks to buy stuff, everything from the buggy to the cot to nappies and wipes and maternity towels (?!) to nursing tops and antenatal massages (in fairness, this wish list business is more common in the us with baby showers and all) and then actually asked us to buy her a changing table. For $160! And what did she buy our kids? Nothing, she didn't even send a card (and also no birthday or Christmas cards or gifts!). We, being non-confrontational mugs, bought the stupid changing table and it still pisses me off to this day! She is comedy tight and obsessed with money though so I do my best to let it wash over me (after I've had a good bitch about it to my own sister!).
I have to put a shout out for the tummy tub. It is honestly the best baby bath and I wish we'd had it when our first was born. We gave ours away before we moved but will definitely get another for this one (it's great for older children helping out with bath time).