One week after accepting the role of president at E-Trade Securities  Inc., Frank J. Petrilli has decided to return to his old job as president   and chief operating officer of TD Waterhouse Group, a unit of Toronto-   Dominion.     
Mr. Petrilli, 48, cited "personal and family reasons" for his abrupt  change of heart. 
  
"Perhaps I made a hasty decision to go to E-Trade and not pursue growth  opportunities at Toronto-Dominion," said Mr. Petrilli, speaking Wednesday   on his first day back at his old post in TD Waterhouse's New York   headquarters. The decision to jump to E-Trade was made "very quickly,"   within a matter of days, he said.       
Mr. Petrilli was set to join Menlo Park, Calif.-based E-Trade sometime  in the next several weeks, to run its retail brokerage, asset management,   and clearing businesses.   
  
But factors such as the likelihood that he would eventually have to  relocate to the West Coast, despite having recently gotten married and   moved into a new house in the New York area, forced him to rethink his   decision, he said.     
And TD Waterhouse has apparently made it worth his while to return. "I  did receive more options on the way back," he said. 
TD Waterhouse went public in June in a bid to cash in on high valuations  for Internet-related firms. The $1 billion offering was the largest initial   public offering for an Internet-related company. Since the company went   public, however, the stock has lost some of its luster, falling from a high   of $26.125 a share to about $16.       
  
TD Waterhouse, a subsidiary of Toronto-Dominion Bank, was the No. 3  ranked on-line broker at the end of the first quarter, according to   research from Credit Suisse First Boston. Holding 11.6% of the on-line   market, TD Waterhouse was just a notch down from E-Trade, which was in   second position with 12.9%. San Francisco-based Charles Schwab & Co. led   the herd with 27.5% of the market.         
At E-Trade, Mr. Petrillo was set to succeed Kathy Levinson, who had been  appointed president of E-Trade Group, the brokerage's parent. Ms. Levinson   will continue to have a dual role at the company until another successor is   found, a company spokesman said. He declined to discuss Mr. Petrillo's   decision.       
Keith Gray, who was to succeed Mr. Petrillo at TD Waterhouse, will work  on "special assignments," Mr. Petrillo said. 
Mr. Petrillo had been at TD Waterhouse since January 1995 and was  previously president and chief executive officer of American Express   Centurion Bank.