Isn't Jones a Welsh name? I know Connery himself is a Scot, but I thought Jones was Welsh.

Senior would appear much as he does in your OP, the daper academic. Three-piece tweed kilt suit, starched shirt and bowtie. I imagine he would even use his Irish Tweed Walking hat. Same shoes and a simple brown leather day sporran.
The real debatable point is what is his kilt made of? Tweed? Family or military tartan?