• Stella Mater et Pater: (Latin for "Star Mother and Father") A classic and reverent choice reflecting their faith and roles.

• Sancta Lux: (Latin for "Holy Light") Evokes the divine light and guidance they provided.

• Beata Stella: (Latin for "Blessed Star") A simple yet elegant name signifying their blessed nature.

• Cor Jesu et Mariae: (Latin for "Heart of Jesus and Mary") A deeply Catholic name referencing the sacred heart.

• Stella Fidei et Caritatis: (Latin for "Star of Faith and Charity") Highlights their strong faith and loving nature.

• Luminaria Pietatis: (Latin for "Lights of Piety") A more poetic name emphasizing their devoutness.

• Stella Benedicta: (Latin for "Blessed Star") A shorter, more concise version of "Beata Stella."

• Ave Maris Stella: (Latin for "Hail, Star of the Sea") A traditional Catholic hymn reference, invoking Mary.

• Dei Gratia: (Latin for "By the Grace of God") A name reflecting their belief in God's grace.

• Pax et Amor: (Latin for "Peace and Love") A simple, yet meaningful name representing their legacy.

• Grandfather's Star/Grandmother's Star: Simple, direct, and personal. Could be combined with a Latin word or phrase for added depth. For example, "Grandfather's Star of Faith" or "Grandmother's Star of Love."

• The Guiding Light: A metaphorical name reflecting their guidance and support.

• The Heavenly Hosts: A more celestial name suggesting their place in heaven.

• The Eternal Flame: Symbolizing their enduring love and memory.

• The Sacred Glow: A poetic name suggesting their holiness and warmth.

These names offer a range of styles, from formal Latin phrases to more straightforward and personal options, all reflecting the grandparents' Catholic faith and loving nature. Consider which name best captures their essence and the feeling you wish to evoke.