The phrase "have later become" is correct and usable in written English.
It is used to refer to something that has changed from what it was originally. For example, "The small business I started five years ago has since grown and has later become a major success."
Since 1900, about 25 percent of the men and women nominated for vice president by the major-party candidates have later become presidential nominees themselves, and 15 percent have actually become president, whether by winning the office on their own or by succeeding an incumbent who died or resigned in office.
She is said to have later become a Muslim.
His widow, Eormenhild, is thought to have later become the abbess of Ely.
Some have later become common or even mandated for the industry — anti-lock brakes in 1978, for instance, and air bags in 1981.
She may also have later become a pharaoh in her own right, ruling alone for a short time after her husband's death.
More than 80percentt of Nigerian women who arrived in Italy by sea during the first six months of 2016 may have later become trafficking victims, a 2016 IOM report found.
The lawyer said that he heard his former client had later become more "politically engaged" and left for Afghanistan.
She asked Sarah Hunter Kelly, a Philadelphia woman who had married well and had later become a decorator, to help her.
Westmoreland and Koster had served together in the Pentagon during the nineteen-fifties, both in key staff jobs, and Westmoreland had later become Superintendent of West Point.
The hospital, which had later become a nursing home, had been abandoned for 25 years and was in a terrible state of disrepair.
However, this association has later become questioned [26 28].
