St. Therese of Lisieux, the Little Flower.
Saint Veronica, who wiped the face of Jesus on his way to Calvary, is somewhat of a legendary saint about whom very little is known. She is only known by a bried mention in apocryphal writings and not in scripture.
Saint Alphonsa of India.
St. Therese of Liseaux is called the Saint of the Little Way.
Nothing is known about Saint Valentine's childhood and very little is known about his adult life except that he was a martyr.
I find no saint named Eva but Saint Eve of Dreux is not a patron saint. Little is known about her except that she was a martyr.
St. Therese of Lisieux
Little is known about Saint Anne's life and it is unknown whether she had any siblings.
Little is known about Saint Martha's adult life and nothing about her childhood.
Philomena is a legendary saint about whom very little is known and most of that through personal revelation which carries little weight with the Church. Nothing is known about her parents.
There isn't a specific Catholic saint who is recognized as the patron saint of empathy. However, Saint Thérèse of Lisieux is often associated with empathy as she deeply empathized with the suffering and struggles of others. She is known for her "Little Way" of showing love and kindness in small acts of compassion.
There isn't a specific saint associated with small details. However, in broader terms, St. Therese of Lisieux is known as the patron saint of missions and is often invoked for help with even the smallest tasks through her "Little Way" philosophy.
There is little known about Saint Valentine of Rome except that he was a priest, possibly bishop, in Rome and died as a martyr. The names of his parents are not known.