Firm name changes - what do you put on the CV?

If you worked at a firm prior to a name change, what do you put on the CV? The old name as it was when you were there or the name as it currently is?

Lovell White Durrant wouldn’t mean much to many folks for example. 

I would say something like (legacy) LWD or if really long forgotten something like Hammond Suddard Edge (fck knows)

Presumably, if you google LWD etc, it makes it clear what the firm has since become?!

How about "Lovell White Durrells (now Hogan Lovells)"

it's probably better to be precise about these things: Masons (now Pinsent Masons) has very different connotations to Biddle & Co (now Pinsent Masons), for example