TORONTO, Feb 4 (Reuters) - Three former Canadian Western

Bank executives will be leaving National Bank,

the new parent company of the Alberta-based lender, following a

C$5 billion ($3.47 billion) takeover, according to an internal

memo seen by Reuters.

The executives leaving the bank are CWB CEO Chris Fowler,

who is retiring, Chief Risk Officer Carolina Parra and Stephen

Murphy, who is the head of the commercial, personal and wealth

business, according to a Jan. 30 memo by Fowler to CWB staff.

Murphy's last day is April 30 and Parra's is Feb. 28.

Fowler, whose retirement was also publicly announced on Monday,

will continue as executive advisor to National Bank CEO Laurent

Ferreira until April 30.

CWB's CFO Matt Rudd will join National Bank's finance team

and Jeff Wright, the head of client solutions and specialty

business, will join the bank as the head of integration for the

commercial team, the memo said.

National Bank closed the deal on Monday following an

approval from Canada's finance minister in December.

The deal gives National Bank, the largest bank in the

province of Quebec, scope to expand in Western Canada, a region

where CWB has grown its footprint over the past 37 years through

a slew of acquisitions.

CWB focuses on providing commercial banking, personal

banking and wealth advisory services to small and medium-sized

business owners. It has also expanded in Ontario through the

opening of new branches.

($1 = 1.4399 Canadian dollars)