This is where our earlier research becomes particularly important.

A substantial genealogy database has:

Michel LAGASSE

d. 16 March 1698, Altenstadt-Wissembourg

with children:

• Jean Lagasse, born before 1686, died 20 May 1747
• Claudius Lagasse, died 12 May 1728

Jean married Antoinette Bertrand on 20 November 1714 and had:

Jean Ignace Lagasse, born 11 April 1717.

That line can be followed for several generations:

Michel Lagasse
(d. 1698)
│
├── Jean Lagasse
│   + Antoinette Bertrand
│   │
│   └── Jean Ignace Lagasse
│       (1717–1771)
│       + Marie-Ève Klemm
│       │
│       └── Jean Stéphane Lagasse
│           (c.1745–1809)
│           │
│           └── André Lagasse
│               + Salomé Dehl
│               │
│               └── Catherine Lagasse
│                   + Joseph Kiefer
│                   │
│                   └── Charles Kiefer
│
└── Claudius Lagasse
    + Françoise Glattigny
    │
    └── Madeleine Françoise Lagasse
        (1707–1767)
        + Jean-Jacques Kornmann
        │
        └── Catherine Kornmann
            + Mathieu Muller
            │
            └── Antoinette Muller
                + Sigismond Baumann
                │
                └── Mathieu Baumann

This descendant information is actually fairly well supported by the OTT-MASSON genealogy database.

But this is the family of Michel Lagasse, not necessarily the descendants of Ludovicus.