The name of the new wife can be added in the pension record of the retired person and after that she can become entitled to family pension on terms and conditions as provided in the pension rules and regulations.
Singh Kapil, you have remarried after your retirement, but ignorant experts are suggesting you to submit your newly wedded wife's name to the department from where you have already retired. Ironical indeed. For me it is foolishness indeed. Your new wife would not become eligible for pensions after your death.